{"id":530208,"date":"2026-03-11T15:49:23","date_gmt":"2026-03-11T08:49:23","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=530208"},"modified":"2026-03-11T15:49:23","modified_gmt":"2026-03-11T08:49:23","slug":"nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/","title":{"rendered":"N\u1eafm V\u1eefng C\u00f4ng Th\u1ee9c Delta ; Delta Ph\u1ea9y: Ch\u00eca Kh\u00f3a Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai"},"content":{"rendered":"<p style=\"text-align: justify;\"><b>C\u00f4ng th\u1ee9c Delta<\/b><span style=\"font-weight: 400;\"> l\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng v\u00e0 gi\u00e1 tr\u1ecb nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai. Delta v\u00e0 Delta Ph\u1ea9y gi\u00fap nhanh ch\u00f3ng gi\u1ea3i c\u00e1c b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai b\u1eb1ng c\u00e1ch d\u1ef1a v\u00e0o gi\u00e1 tr\u1ecb t\u00ednh \u0111\u01b0\u1ee3c t\u1eeb c\u00e1c h\u1ec7 s\u1ed1 c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh.<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>T\u1ed5ng quan v\u1ec1 c\u00f4ng th\u1ee9c delta v\u00e0 delta ph\u1ea9y<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c Ph\u1ea9y v\u00e0 Delta l\u00e0 hai c\u00f4ng c\u1ee5 n\u1ec1n t\u1ea3ng gi\u00fap nh\u1eadn di\u1ec7n nhanh nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai. B\u1ea1n s\u1ebd b\u1eaft g\u1eb7p ch\u00fang \u1edf m\u1ecdi c\u1ea5p h\u1ecdc t\u1eeb THCS \u0111\u1ebfn THPT, c\u0169ng nh\u01b0 trong c\u00e1c b\u00e0i to\u00e1n th\u1ef1c ti\u1ec5n v\u1ec1 chuy\u1ec3n \u0111\u1ed9ng, h\u00ecnh h\u1ecdc, k\u1ef9 thu\u1eadt.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>\u00dd ngh\u0129a trong to\u00e1n h\u1ecdc.<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Delta (k\u00fd hi\u1ec7u \u0394) l\u00e0 m\u1ed9t bi\u1ec3u th\u1ee9c trong to\u00e1n h\u1ecdc d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai d\u1ea1ng <\/span><i><span style=\"font-weight: 400;\">ax\u00b2 + bx + c = 0<\/span><\/i><span style=\"font-weight: 400;\">. C\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t l\u00e0 <\/span><b>\u0394 = b\u00b2 &#8211; 4ac<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Ngu\u1ed3n g\u1ed1c bi\u1ec7t th\u1ee9c delta<\/b><span style=\"font-weight: 400;\">: Xu\u1ea5t ph\u00e1t t\u1eeb vi\u1ec7c gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai b\u1eb1ng c\u00f4ng th\u1ee9c nghi\u1ec7m t\u1ed5ng qu\u00e1t, \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n t\u1eeb th\u1eddi Hy L\u1ea1p c\u1ed5 \u0111\u1ea1i v\u00e0 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i t\u1eeb th\u1ebf k\u1ef7 17.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>\u00dd ngh\u0129a c\u1ee7a delta trong ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc 2:<\/b><span style=\"font-weight: 400;\"> Gi\u00e1 tr\u1ecb c\u1ee7a delta cho bi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 bao nhi\u00eau nghi\u1ec7m th\u1ef1c \u2013 n\u1ebfu \u0394 &gt; 0 c\u00f3 2 nghi\u1ec7m, \u0394 = 0 c\u00f3 1 nghi\u1ec7m k\u00e9p, \u0394 &lt; 0 v\u00f4 nghi\u1ec7m th\u1ef1c.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c n\u00e0y<\/span> <span style=\"font-weight: 400;\">gi\u00fap gi\u1ea3i nhanh c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai m\u00e0 kh\u00f4ng c\u1ea7n th\u1eed t\u1eebng gi\u00e1 tr\u1ecb, ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 t\u0103ng \u0111\u1ed9 ch\u00ednh x\u00e1c trong h\u1ecdc t\u1eadp, nghi\u00ean c\u1ee9u k\u1ef9 thu\u1eadt, v\u1eadt l\u00fd, h\u00f3a h\u1ecdc v\u00e0 nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-1.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-1-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-1-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-530411 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-1.jpg\" alt=\"cong-thuc-delta-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h3 style=\"text-align: justify;\"><b>Khi n\u00e0o d\u00f9ng c\u00f4ng th\u1ee9c Ph\u1ea9y v\u00e0 Delta<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>C\u00f4ng th\u1ee9c Ph\u1ea9y v\u00e0 Delta:<\/b><span style=\"font-weight: 400;\"> C\u1ea3 hai \u0111\u1ec1u gi\u00fap x\u00e1c \u0111\u1ecbnh s\u1ed1 nghi\u1ec7m ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai, nh\u01b0ng <\/span><b>Delta Ph\u1ea9y (\u0394&#8217;)<\/b><span style=\"font-weight: 400;\"> l\u00e0 phi\u00ean b\u1ea3n r\u00fat g\u1ecdn d\u00f9ng khi h\u1ec7 s\u1ed1 <\/span><b>b<\/b><span style=\"font-weight: 400;\"> l\u00e0 s\u1ed1 ch\u1eb5n.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>C\u00f4ng th\u1ee9c Delta:<\/b><span style=\"font-weight: 400;\"> \u0394 = b\u00b2 &#8211; 4ac; <\/span><b>C\u00f4ng th\u1ee9c Ph\u1ea9y:<\/b><span style=\"font-weight: 400;\"> \u0394&#8217; = (b\/2)\u00b2 &#8211; ac.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Khi n\u00e0o d\u00f9ng delta ph\u1ea9y?<\/b><span style=\"font-weight: 400;\"> Khi b l\u00e0 s\u1ed1 ch\u1eb5n, d\u00f9ng delta ph\u1ea9y gi\u00fap gi\u1ea3m ph\u00e9p t\u00ednh, tr\u00e1nh s\u1ed1 l\u1edbn ho\u1eb7c l\u1ebb.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>V\u00ed d\u1ee5 nhanh:<\/b><span style=\"font-weight: 400;\"> Ph\u01b0\u01a1ng tr\u00ecnh 2x\u00b2 + 4x + 1 = 0 c\u00f3 b = 4 (ch\u1eb5n), n\u00ean d\u00f9ng delta ph\u1ea9y: \u0394&#8217; = (4\/2)\u00b2 &#8211; 2\u00d71 = 4 &#8211; 2 = 2. N\u1ebfu d\u00f9ng delta th\u01b0\u1eddng: \u0394 = 16 &#8211; 8 = 8.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><b>C\u00f4ng th\u1ee9c Delta chi ti\u1ebft v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh Delta gi\u00fap x\u00e1c \u0111\u1ecbnh nhanh s\u1ed1 nghi\u1ec7m v\u00e0 gi\u00e1 tr\u1ecb nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn chi ti\u1ebft t\u1eebng tr\u01b0\u1eddng h\u1ee3p v\u00e0 v\u00ed d\u1ee5 minh h\u1ecda d\u1ec5 hi\u1ec3u.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>C\u00f4ng th\u1ee9c t\u00ednh Delta v\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p nghi\u1ec7m.<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>C\u00f4ng th\u1ee9c t\u00ednh delta:<\/b><span style=\"font-weight: 400;\"> V\u1edbi ph\u01b0\u01a1ng tr\u00ecnh ax\u00b2 + bx + c = 0, ta c\u00f3 \u0394 = b\u00b2 &#8211; 4ac.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Tr\u01b0\u1eddng h\u1ee3p 1 \u2013 Delta l\u1edbn h\u01a1n 0 (\u0394 &gt; 0):<\/b><span style=\"font-weight: 400;\"> Ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 2 nghi\u1ec7m ph\u00e2n bi\u1ec7t:<\/span>\n<ul>\n<li style=\"font-weight: 400;\"><b>C\u00f4ng th\u1ee9c t\u00ednh x\u2081, x\u2082 theo delta:<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">x\u2081 = (-b + \u221a\u0394)\/(2a)<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">x\u2082 = (-b &#8211; \u221a\u0394)\/(2a)<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\"><b>Tr\u01b0\u1eddng h\u1ee3p 2 \u2013 Delta b\u1eb1ng 0 (\u0394 = 0):<\/b><span style=\"font-weight: 400;\"> Ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 nghi\u1ec7m k\u00e9p:<\/span>\n<ul>\n<li style=\"font-weight: 400;\"><b>C\u00f4ng th\u1ee9c nghi\u1ec7m k\u00e9p delta:<\/b><span style=\"font-weight: 400;\"> x\u2081 = x\u2082 = -b\/(2a)<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\"><b>Tr\u01b0\u1eddng h\u1ee3p 3 \u2013 Delta nh\u1ecf h\u01a1n 0 (\u0394 &lt; 0):<\/b><span style=\"font-weight: 400;\"> Ph\u01b0\u01a1ng tr\u00ecnh kh\u00f4ng c\u00f3 nghi\u1ec7m th\u1ef1c (ch\u1ec9 c\u00f3 nghi\u1ec7m ph\u1ee9c).<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-2.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-2-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-2-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-530412 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-2.jpg\" alt=\"cong-thuc-delta-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 1:<\/b><span style=\"font-weight: 400;\"> Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh x\u00b2 &#8211; 3x + 2 = 0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ta c\u00f3 a = 1, b = -3, c = 2.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0394 = (-3)\u00b2 &#8211; 4\u00d71\u00d72 = 9 &#8211; 8 = 1 &gt; 0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">V\u1eady ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 2 nghi\u1ec7m:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">x\u2081 = (3 + 1)\/2 = 2; x\u2082 = (3 &#8211; 1)\/2 = 1.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 2:<\/b><span style=\"font-weight: 400;\"> Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 2x\u00b2 + 4x + 2 = 0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">a = 2, b = 4, c = 2.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0394 = 16 &#8211; 16 = 0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">V\u1eady nghi\u1ec7m k\u00e9p: x = -4\/(2\u00d72) = -1.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 3:<\/b><span style=\"font-weight: 400;\"> Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh x\u00b2 + 2x + 5 = 0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0394 = 4 &#8211; 20 = -16 &lt; 0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ph\u01b0\u01a1ng tr\u00ecnh v\u00f4 nghi\u1ec7m th\u1ef1c.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>H\u01b0\u1edbng d\u1eabn c\u00e1ch t\u00ednh Delta ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc 2 A-Z.<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>B\u01b0\u1edbc 1:<\/b><span style=\"font-weight: 400;\"> X\u00e1c \u0111\u1ecbnh a, b, c t\u1eeb ph\u01b0\u01a1ng tr\u00ecnh.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>B\u01b0\u1edbc 2:<\/b><span style=\"font-weight: 400;\"> T\u00ednh \u0394 = b\u00b2 &#8211; 4ac.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>B\u01b0\u1edbc 3:<\/b><span style=\"font-weight: 400;\"> So s\u00e1nh gi\u00e1 tr\u1ecb \u0394 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ed1 nghi\u1ec7m.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>B\u01b0\u1edbc 4:<\/b><span style=\"font-weight: 400;\"> \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh nghi\u1ec7m t\u01b0\u01a1ng \u1ee9ng.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>L\u01b0u \u00fd:<\/b><span style=\"font-weight: 400;\"> Ki\u1ec3m tra k\u1ef9 h\u1ec7 s\u1ed1, \u0111\u1eb7c bi\u1ec7t khi a, b, c l\u00e0 s\u1ed1 \u00e2m ho\u1eb7c ph\u00e2n s\u1ed1.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><b>B\u00e0i t\u1eadp t\u1ef1 luy\u1ec7n:<\/b><span style=\"font-weight: 400;\"> Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 3x\u00b2 &#8211; 6x + 3 = 0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">a = 3, b = -6, c = 3.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0394 = (-6)\u00b2 &#8211; 4\u00d73\u00d73 = 36 &#8211; 36 = 0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Nghi\u1ec7m k\u00e9p: x = 1.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-4.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-4-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-4-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-530414 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-4.jpg\" alt=\"cong-thuc-delta-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h3 style=\"text-align: justify;\"><b>B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng c\u00f4ng th\u1ee9c Delta.<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>B\u00e0i 1:<\/b><span style=\"font-weight: 400;\"> Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh x\u00b2 + 5x + 6 = 0.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><i><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/i><span style=\"font-weight: 400;\"> a = 1; b = 5; c = 6.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">\u0394 = 25 &#8211; 24 = 1 &gt; 0.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">x\u2081 = (-5 + 1)\/2 = -2, x\u2082 = (-5 &#8211; 1)\/2 = -3.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>B\u00e0i 2:<\/b><span style=\"font-weight: 400;\"> Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh x\u00b2 &#8211; 2x + 1 = 0.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><i><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/i><span style=\"font-weight: 400;\"> a = 1; b = -2; c = 1.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">\u0394 = 4 &#8211; 4 = 0.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Nghi\u1ec7m k\u00e9p: x = 1.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>B\u00e0i 3:<\/b><span style=\"font-weight: 400;\"> Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 2x\u00b2 + 2x + 5 = 0.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><i><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/i><span style=\"font-weight: 400;\"> a = 2; b = 2; c = 5.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">\u0394 = 4 &#8211; 40 = -36 &lt; 0.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">V\u00f4 nghi\u1ec7m th\u1ef1c.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-5.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-5-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-5-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-530415 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-5.jpg\" alt=\"cong-thuc-delta-5\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-5.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-5-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-5-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h2 style=\"text-align: justify;\"><b>C\u00f4ng th\u1ee9c Delta ph\u1ea9y v\u00e0 \u1ee9ng d\u1ee5ng<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Delta ph\u1ea9y l\u00e0 m\u1ed9t bi\u1ebfn th\u1ec3 t\u1ed1i \u01b0u c\u1ee7a c\u00f4ng th\u1ee9c t\u00ednh delta, gi\u00fap \u0111\u01a1n gi\u1ea3n ph\u00e9p t\u00ednh khi h\u1ec7 s\u1ed1 b ch\u1eb5n. \u0110\u00e2y l\u00e0 c\u00f4ng c\u1ee5 \u0111\u01b0\u1ee3c khuy\u1ebfn kh\u00edch s\u1eed d\u1ee5ng trong c\u00e1c b\u00e0i to\u00e1n th\u1ef1c t\u1ebf \u0111\u1ec3 gi\u1ea3m b\u1edbt ph\u00e9p t\u00ednh ph\u1ee9c t\u1ea1p.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>Delta ph\u1ea9y l\u00e0 g\u00ec? Khi n\u00e0o d\u00f9ng?<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>Delta ph\u1ea9y (\u0394\u2019):<\/b><span style=\"font-weight: 400;\"> \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng khi h\u1ec7 s\u1ed1 b l\u00e0 s\u1ed1 ch\u1eb5n, c\u00f4ng th\u1ee9c: \u0394\u2019 = (b\/2)\u00b2 &#8211; ac.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Khi n\u00e0o d\u00f9ng delta ph\u1ea9y:<\/b><span style=\"font-weight: 400;\"> Khi b l\u00e0 s\u1ed1 ch\u1eb5n, chia b cho 2 r\u1ed3i b\u00ecnh ph\u01b0\u01a1ng s\u1ebd gi\u1ea3m thao t\u00e1c t\u00ednh to\u00e1n, nh\u1ea5t l\u00e0 khi h\u1ec7 s\u1ed1 l\u1edbn.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>V\u00ed d\u1ee5:<\/b><span style=\"font-weight: 400;\"> Ph\u01b0\u01a1ng tr\u00ecnh 4x\u00b2 + 8x + 3 = 0.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">b = 8 (ch\u1eb5n), \u0394\u2019 = (8\/2)\u00b2 &#8211; 4\u00d73 = 16 &#8211; 12 = 4.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">K\u1ebft lu\u1eadn: \u0394\u2019 &gt; 0, c\u00f3 2 nghi\u1ec7m ph\u00e2n bi\u1ec7t.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-6.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-6-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-6-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-530416 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-6.jpg\" alt=\"cong-thuc-delta-6\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-6.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-6-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-6-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h3 style=\"text-align: justify;\"><b>C\u00f4ng th\u1ee9c nghi\u1ec7m v\u1edbi Delta Ph\u1ea9y<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">N\u1ebfu \u0394\u2019 &gt; 0: x\u2081 = [ -b\/2a + \u221a\u0394\u2019\/a ], x\u2082 = [ -b\/2a &#8211; \u221a\u0394\u2019\/a ]<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">\u0394\u2019 = 0: Nghi\u1ec7m k\u00e9p x = -b\/(2a)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">\u0394\u2019 &lt; 0: Ph\u01b0\u01a1ng tr\u00ecnh v\u00f4 nghi\u1ec7m th\u1ef1c<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf:<\/b><span style=\"font-weight: 400;\"> Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 2x\u00b2 + 6x + 2 = 0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">a = 2, b = 6 (ch\u1eb5n), c = 2.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0394\u2019 = (6\/2)\u00b2 &#8211; 2\u00d72 = 9 &#8211; 4 = 5.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">x\u2081 = [ -3 + \u221a5 ]\/2; x\u2082 = [ -3 &#8211; \u221a5 ]\/2.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>L\u1ee3i \u00edch khi s\u1eed d\u1ee5ng delta ph\u1ea9y<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">C\u1eaft gi\u1ea3m ph\u00e9p t\u00ednh v\u1edbi h\u1ec7 s\u1ed1 l\u1edbn ho\u1eb7c l\u1ebb.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gi\u00fap h\u1ecdc sinh d\u1ec5 ghi nh\u1edb v\u00e0 \u00e1p d\u1ee5ng trong c\u00e1c b\u00e0i to\u00e1n ki\u1ec3m tra.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">R\u00f5 r\u00e0ng, minh b\u1ea1ch khi tr\u00ecnh b\u00e0y b\u00e0i gi\u1ea3i.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><b>Ki\u1ebfn th\u1ee9c b\u1ed5 tr\u1ee3 v\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t v\u1ec1 c\u00f4ng th\u1ee9c Delta<\/b><\/h2>\n<p style=\"text-align: justify;\"><b>Kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n, Delta c\u00f2n c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng m\u1edf r\u1ed9ng v\u00e0 xu\u1ea5t hi\u1ec7n trong c\u00e1c l\u1edbp h\u1ecdc kh\u00e1c nhau.<\/b><span style=\"font-weight: 400;\"> D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ki\u1ebfn th\u1ee9c m\u1edf r\u1ed9ng gi\u00fap b\u1ea1n n\u1eafm ch\u1eafc h\u01a1n v\u1ec1 c\u00f4ng th\u1ee9c n\u00e0y.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>Li\u00ean h\u1ec7 v\u1edbi c\u00f4ng th\u1ee9c Viet<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>C\u00f4ng th\u1ee9c Viet<\/b><span style=\"font-weight: 400;\"> gi\u00fap li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp t\u1ed5ng v\u00e0 t\u00edch hai nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">N\u1ebfu x\u2081, x\u2082 l\u00e0 nghi\u1ec7m c\u1ee7a ax\u00b2 + bx + c = 0, th\u00ec:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">x\u2081 + x\u2082 = -b\/a<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">x\u2081 \u00d7 x\u2082 = c\/a<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 ki\u1ebfn th\u1ee9c b\u1ed5 tr\u1ee3 gi\u00fap x\u00e1c nh\u1eadn nghi\u1ec7m t\u00ecm \u0111\u01b0\u1ee3c qua delta.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-7.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-7-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-7-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-530417 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-7.jpg\" alt=\"cong-thuc-delta-7\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-7.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-7-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-7-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h3 style=\"text-align: justify;\"><b>C\u00f4ng th\u1ee9c t\u00ednh Delta trong c\u00e1c c\u1ea5p h\u1ecdc<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>L\u1edbp 9:<\/b><span style=\"font-weight: 400;\"> H\u1ecdc sinh b\u1eaft \u0111\u1ea7u l\u00e0m quen v\u1edbi <\/span><b>c\u00f4ng th\u1ee9c delta l\u1edbp 9<\/b><span style=\"font-weight: 400;\">, c\u00e1c b\u00e0i to\u00e1n c\u01a1 b\u1ea3n.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>L\u1edbp 10, 12:<\/b><span style=\"font-weight: 400;\"> \u1ee8ng d\u1ee5ng n\u00e2ng cao, gi\u1ea3i c\u00e1c b\u00e0i to\u00e1n c\u00f3 h\u1ec7 s\u1ed1 ph\u1ee9c t\u1ea1p, b\u00e0i to\u00e1n th\u1ef1c t\u1ebf, ch\u1ee9ng minh b\u1ea5t \u0111\u1eb3ng th\u1ee9c.<\/span><\/li>\n<\/ul>\n<h3 style=\"text-align: justify;\"><b>C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t v\u00e0 n\u00e2ng cao<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>C\u00f4ng th\u1ee9c t\u00ednh delta c\u00f3 bao nhi\u00eau tr\u01b0\u1eddng h\u1ee3p?<\/b><span style=\"font-weight: 400;\"> \u2013 C\u00f3 3 tr\u01b0\u1eddng h\u1ee3p c\u01a1 b\u1ea3n (\u0394 &gt; 0, \u0394 = 0, \u0394 &lt; 0) v\u00e0 m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t khi c\u00e1c h\u1ec7 s\u1ed1 a, b, c mang gi\u00e1 tr\u1ecb \u0111\u1eb7c bi\u1ec7t (v\u00ed d\u1ee5, c = 0 ho\u1eb7c a + b + c = 0).<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>C\u00f4ng th\u1ee9c t\u00ednh delta d\u1ec5 hi\u1ec3u:<\/b><span style=\"font-weight: 400;\"> Ch\u1ee7 y\u1ebfu d\u1ef1a tr\u00ean gi\u00e1 tr\u1ecb so s\u00e1nh c\u1ee7a \u0394 (ho\u1eb7c \u0394\u2019), kh\u00f4ng y\u00eau c\u1ea7u ki\u1ebfn th\u1ee9c cao si\u00eau.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>B\u00e0i t\u1eadp c\u00f4ng th\u1ee9c t\u00ednh delta l\u1edbp 9 c\u00f3 l\u1eddi gi\u1ea3i:<\/b><span style=\"font-weight: 400;\"> L\u00e0 d\u1ea1ng b\u00e0i quen thu\u1ed9c trong c\u00e1c \u0111\u1ec1 ki\u1ec3m tra, \u00f4n t\u1eadp, thi h\u1ecdc k\u1ef3.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><b>\u1ee8ng d\u1ee5ng c\u00f4ng th\u1ee9c Delta trong c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">K\u00fd hi\u1ec7u Delta (\u0394) kh\u00f4ng ch\u1ec9 xu\u1ea5t hi\u1ec7n trong to\u00e1n h\u1ecdc m\u00e0 c\u00f2n \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nh\u01b0 V\u1eadt l\u00fd, H\u00f3a h\u1ecdc, K\u1ef9 thu\u1eadt, Kinh t\u1ebf.<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>V\u1eadt l\u00fd:<\/b><span style=\"font-weight: 400;\"> Delta bi\u1ec3u di\u1ec5n s\u1ef1 thay \u0111\u1ed5i (v\u00ed d\u1ee5: \u0394v l\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean v\u1eadn t\u1ed1c, \u0394t l\u00e0 bi\u1ebfn thi\u00ean th\u1eddi gian).<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>H\u00f3a h\u1ecdc:<\/b><span style=\"font-weight: 400;\"> Delta th\u1ec3 hi\u1ec7n m\u1ee9c \u0111\u1ed9 bi\u1ebfn thi\u00ean n\u0103ng l\u01b0\u1ee3ng, enthalpy (\u0394H), nhi\u1ec7t l\u01b0\u1ee3ng ph\u1ea3n \u1ee9ng.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>K\u1ef9 thu\u1eadt &amp; Kinh t\u1ebf:<\/b><span style=\"font-weight: 400;\"> D\u00f9ng \u0111\u1ec3 m\u00f4 t\u1ea3 s\u1ef1 thay \u0111\u1ed5i c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng, bi\u1ebfn \u0111\u1ed9ng gi\u00e1 tr\u1ecb, sai s\u1ed1, ph\u01b0\u01a1ng sai.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>To\u00e1n h\u1ecdc:<\/b><span style=\"font-weight: 400;\"> Ngo\u00e0i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai, Delta c\u00f2n xu\u1ea5t hi\u1ec7n trong ma tr\u1eadn, \u0111\u1ea1o h\u00e0m, gi\u1edbi h\u1ea1n, x\u00e1c su\u1ea5t th\u1ed1ng k\u00ea.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Vi\u1ec7c hi\u1ec3u r\u00f5 \u00fd ngh\u0129a v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a Delta gi\u00fap h\u1ecdc sinh, sinh vi\u00ean v\u00e0 ng\u01b0\u1eddi \u0111i l\u00e0m ph\u00e2n t\u00edch t\u1ed1t h\u01a1n c\u00e1c d\u1eef li\u1ec7u v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng th\u1ef1c ti\u1ec5n.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-8.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-8-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/cong-thuc-delta-8-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-530418 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-8.jpg\" alt=\"cong-thuc-delta-8\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-8.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-8-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta-8-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h2 style=\"text-align: justify;\"><b>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c delta ph\u1ea9y?<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">N\u00ean s\u1eed d\u1ee5ng delta ph\u1ea9y (\u0394\u2019 = (b\/2)\u00b2 &#8211; ac) khi h\u1ec7 s\u1ed1 b l\u00e0 s\u1ed1 ch\u1eb5n. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m ph\u00e9p t\u00ednh v\u00e0 h\u1ea1n ch\u1ebf l\u00e0m vi\u1ec7c v\u1edbi s\u1ed1 l\u1edbn ho\u1eb7c l\u1ebb, \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong c\u00e1c b\u00e0i ki\u1ec3m tra ho\u1eb7c b\u00e0i to\u00e1n t\u00ednh nh\u1ea9m nhanh.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c nghi\u1ec7m delta v\u00e0 delta ph\u1ea9y kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c nghi\u1ec7m delta s\u1eed d\u1ee5ng \u0394 = b\u00b2 &#8211; 4ac, c\u00f2n delta ph\u1ea9y d\u00f9ng \u0394\u2019 = (b\/2)\u00b2 &#8211; ac. Hai c\u00f4ng th\u1ee9c n\u00e0y cho c\u00f9ng k\u1ebft qu\u1ea3 nghi\u1ec7m, nh\u01b0ng delta ph\u1ea9y thu\u1eadn ti\u1ec7n h\u01a1n khi b ch\u1eb5n.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">L\u00e0m sao \u0111\u1ec3 nh\u1eadn bi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai c\u00f3 nghi\u1ec7m k\u00e9p?<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">N\u1ebfu t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c delta (ho\u1eb7c delta ph\u1ea9y) b\u1eb1ng 0, ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai s\u1ebd c\u00f3 nghi\u1ec7m k\u00e9p duy nh\u1ea5t x = -b\/(2a).<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Delta nh\u1ecf h\u01a1n 0 ngh\u0129a l\u00e0 g\u00ec?<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">N\u1ebfu delta nh\u1ecf h\u01a1n 0, ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai kh\u00f4ng c\u00f3 nghi\u1ec7m th\u1ef1c, m\u00e0 ch\u1ec9 c\u00f3 nghi\u1ec7m ph\u1ee9c, ngh\u0129a l\u00e0 nghi\u1ec7m kh\u00f4ng n\u1eb1m tr\u00ean tr\u1ee5c s\u1ed1 th\u1ef1c.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f3 m\u1eb9o nh\u1edb nhanh c\u00f4ng th\u1ee9c delta kh\u00f4ng?<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u1ea1n c\u00f3 th\u1ec3 nh\u1edb nhanh: \u201cB b\u00ecnh tr\u1eeb b\u1ed1n a c\u201d \u2013 t\u1ee9c \u0394 = b\u00b2 &#8211; 4ac. N\u1ebfu b l\u00e0 s\u1ed1 ch\u1eb5n, nh\u1edb chia \u0111\u00f4i b r\u1ed3i b\u00ecnh ph\u01b0\u01a1ng \u0111\u1ec3 d\u00f9ng delta ph\u1ea9y.<\/span><\/p>\n<p><strong>Xem th\u00eam:<\/strong><\/p>\n<ul>\n<li>\n<p class=\"elementor-heading-title elementor-size-default\"><span style=\"color: #339966;\"><strong><a style=\"color: #339966;\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/ham-offset\/\">H\u00e0m OFFSET l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng k\u00e8m v\u00ed d\u1ee5 minh h\u1ecda<\/a><\/strong><\/span><\/p>\n<\/li>\n<li>\n<p class=\"elementor-heading-title elementor-size-default\"><span style=\"color: #339966;\"><strong><a style=\"color: #339966;\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-cong\/\">C\u00f4ng c\u01a1 h\u1ecdc l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng chu\u1ea9n k\u00e8m v\u00ed d\u1ee5 minh h\u1ecda<\/a><\/strong><\/span><\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>C\u00f4ng th\u1ee9c Delta l\u00e0 ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng v\u00e0 gi\u00e1 tr\u1ecb nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai. Delta v\u00e0 Delta Ph\u1ea9y gi\u00fap nhanh ch\u00f3ng gi\u1ea3i c\u00e1c b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai b\u1eb1ng c\u00e1ch d\u1ef1a v\u00e0o gi\u00e1 tr\u1ecb t\u00ednh \u0111\u01b0\u1ee3c t\u1eeb c\u00e1c h\u1ec7 s\u1ed1 c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh. T\u1ed5ng quan v\u1ec1 [&hellip;]<\/p>\n","protected":false},"author":84,"featured_media":530410,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29235,3910,30453],"tags":[],"class_list":["post-530208","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goc-to-mo","category-kham-pha","category-kien-thuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00f4ng Th\u1ee9c Delta &amp; Delta Ph\u1ea9y: C\u00e1ch Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai<\/title>\n<meta name=\"description\" content=\"H\u01b0\u1edbng d\u1eabn c\u00f4ng th\u1ee9c Delta v\u00e0 Delta ph\u1ea9y gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 c\u00e1ch gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai v\u00e0 \u00e1p d\u1ee5ng hi\u1ec7u qu\u1ea3 trong b\u00e0i t\u1eadp.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"N\u1eafm V\u1eefng C\u00f4ng Th\u1ee9c Delta ; Delta Ph\u1ea9y: Ch\u00eca Kh\u00f3a Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai\" \/>\n<meta property=\"og:description\" content=\"H\u01b0\u1edbng d\u1eabn c\u00f4ng th\u1ee9c Delta v\u00e0 Delta ph\u1ea9y gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 c\u00e1ch gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai v\u00e0 \u00e1p d\u1ee5ng hi\u1ec7u qu\u1ea3 trong b\u00e0i t\u1eadp.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/\" \/>\n<meta property=\"og:site_name\" content=\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/hoanghamobilecom\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/hoanghamobilecom\" \/>\n<meta property=\"article:published_time\" content=\"2026-03-11T08:49:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Daisy Daisy\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daisy Daisy\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"12 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/\"},\"author\":{\"name\":\"Daisy Daisy\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/a7254cd2473ea15c26ef1b1fcd58398c\"},\"headline\":\"N\u1eafm V\u1eefng C\u00f4ng Th\u1ee9c Delta ; Delta Ph\u1ea9y: Ch\u00eca Kh\u00f3a Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai\",\"datePublished\":\"2026-03-11T08:49:23+00:00\",\"dateModified\":\"2026-03-11T08:49:23+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/\"},\"wordCount\":2389,\"publisher\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\"},\"image\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg\",\"articleSection\":[\"G\u00f3c t\u00f2 m\u00f2\",\"Kh\u00e1m Ph\u00e1\",\"Ki\u1ebfn Th\u1ee9c\"],\"inLanguage\":\"vi\",\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/\",\"name\":\"C\u00f4ng Th\u1ee9c Delta & Delta Ph\u1ea9y: C\u00e1ch Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai\",\"isPartOf\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg\",\"datePublished\":\"2026-03-11T08:49:23+00:00\",\"dateModified\":\"2026-03-11T08:49:23+00:00\",\"description\":\"H\u01b0\u1edbng d\u1eabn c\u00f4ng th\u1ee9c Delta v\u00e0 Delta ph\u1ea9y gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 c\u00e1ch gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai v\u00e0 \u00e1p d\u1ee5ng hi\u1ec7u qu\u1ea3 trong b\u00e0i t\u1eadp.\",\"breadcrumb\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#breadcrumb\"},\"inLanguage\":\"vi\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#primaryimage\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg\",\"contentUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg\",\"width\":1200,\"height\":628,\"caption\":\"cong-thuc-delta\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Trang ch\u1ee7\",\"item\":\"https:\/\/hoanghamobile.com\/tin-tuc\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"N\u1eafm V\u1eefng C\u00f4ng Th\u1ee9c Delta ; Delta Ph\u1ea9y: Ch\u00eca Kh\u00f3a Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#website\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/\",\"name\":\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/hoanghamobile.com\/tin-tuc\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"vi\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\",\"name\":\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2021\/12\/logo-text.png\",\"contentUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2021\/12\/logo-text.png\",\"width\":256,\"height\":37,\"caption\":\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\"},\"image\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/hoanghamobilecom\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/a7254cd2473ea15c26ef1b1fcd58398c\",\"name\":\"Daisy Daisy\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/litespeed\/avatar\/4261b6751d190cb0b62038d948ff8dbb.jpg?ver=1774865089\",\"contentUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/litespeed\/avatar\/4261b6751d190cb0b62038d948ff8dbb.jpg?ver=1774865089\",\"caption\":\"Daisy Daisy\"},\"description\":\"M\u00ecnh l\u00e0 Daisy, m\u1ed9t ng\u01b0\u1eddi d\u00f9ng th\u00edch kh\u00e1m ph\u00e1 c\u00f4ng ngh\u1ec7 v\u00e0 chia s\u1ebb nh\u1eefng tr\u1ea3i nghi\u1ec7m th\u1ef1c t\u1ebf. C\u1ea3m \u01a1n m\u1ecdi ng\u01b0\u1eddi \u0111\u00e3 \u0111\u1ecdc v\u00e0 chia s\u1ebb b\u00e0i vi\u1ebft c\u1ee7a m\u00ecnh nh\u00e9.\",\"sameAs\":[\"https:\/\/www.facebook.com\/hoanghamobilecom\"],\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/author\/nguyen-bao-ni\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"C\u00f4ng Th\u1ee9c Delta & Delta Ph\u1ea9y: C\u00e1ch Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai","description":"H\u01b0\u1edbng d\u1eabn c\u00f4ng th\u1ee9c Delta v\u00e0 Delta ph\u1ea9y gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 c\u00e1ch gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai v\u00e0 \u00e1p d\u1ee5ng hi\u1ec7u qu\u1ea3 trong b\u00e0i t\u1eadp.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/","og_locale":"vi_VN","og_type":"article","og_title":"N\u1eafm V\u1eefng C\u00f4ng Th\u1ee9c Delta ; Delta Ph\u1ea9y: Ch\u00eca Kh\u00f3a Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai","og_description":"H\u01b0\u1edbng d\u1eabn c\u00f4ng th\u1ee9c Delta v\u00e0 Delta ph\u1ea9y gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 c\u00e1ch gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai v\u00e0 \u00e1p d\u1ee5ng hi\u1ec7u qu\u1ea3 trong b\u00e0i t\u1eadp.","og_url":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/","og_site_name":"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile","article_publisher":"https:\/\/www.facebook.com\/hoanghamobilecom","article_author":"https:\/\/www.facebook.com\/hoanghamobilecom","article_published_time":"2026-03-11T08:49:23+00:00","og_image":[{"width":1200,"height":628,"url":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg","type":"image\/jpeg"}],"author":"Daisy Daisy","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Daisy Daisy","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"12 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#article","isPartOf":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/"},"author":{"name":"Daisy Daisy","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/a7254cd2473ea15c26ef1b1fcd58398c"},"headline":"N\u1eafm V\u1eefng C\u00f4ng Th\u1ee9c Delta ; Delta Ph\u1ea9y: Ch\u00eca Kh\u00f3a Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai","datePublished":"2026-03-11T08:49:23+00:00","dateModified":"2026-03-11T08:49:23+00:00","mainEntityOfPage":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/"},"wordCount":2389,"publisher":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#organization"},"image":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#primaryimage"},"thumbnailUrl":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg","articleSection":["G\u00f3c t\u00f2 m\u00f2","Kh\u00e1m Ph\u00e1","Ki\u1ebfn Th\u1ee9c"],"inLanguage":"vi","copyrightYear":"2026","copyrightHolder":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#organization"}},{"@type":"WebPage","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/","url":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/","name":"C\u00f4ng Th\u1ee9c Delta & Delta Ph\u1ea9y: C\u00e1ch Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai","isPartOf":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#website"},"primaryImageOfPage":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#primaryimage"},"image":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#primaryimage"},"thumbnailUrl":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg","datePublished":"2026-03-11T08:49:23+00:00","dateModified":"2026-03-11T08:49:23+00:00","description":"H\u01b0\u1edbng d\u1eabn c\u00f4ng th\u1ee9c Delta v\u00e0 Delta ph\u1ea9y gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 c\u00e1ch gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai v\u00e0 \u00e1p d\u1ee5ng hi\u1ec7u qu\u1ea3 trong b\u00e0i t\u1eadp.","breadcrumb":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#breadcrumb"},"inLanguage":"vi","potentialAction":[{"@type":"ReadAction","target":["https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/"]}]},{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#primaryimage","url":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg","contentUrl":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/cong-thuc-delta.jpg","width":1200,"height":628,"caption":"cong-thuc-delta"},{"@type":"BreadcrumbList","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/nam-vung-cong-thuc-delta-delta-phay-chia-khoa-giai-phuong-trinh-bac-hai\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Trang ch\u1ee7","item":"https:\/\/hoanghamobile.com\/tin-tuc\/"},{"@type":"ListItem","position":2,"name":"N\u1eafm V\u1eefng C\u00f4ng Th\u1ee9c Delta ; Delta Ph\u1ea9y: Ch\u00eca Kh\u00f3a Gi\u1ea3i Ph\u01b0\u01a1ng Tr\u00ecnh B\u1eadc Hai"}]},{"@type":"WebSite","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#website","url":"https:\/\/hoanghamobile.com\/tin-tuc\/","name":"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile","description":"","publisher":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/hoanghamobile.com\/tin-tuc\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"vi"},{"@type":"Organization","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#organization","name":"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile","url":"https:\/\/hoanghamobile.com\/tin-tuc\/","logo":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/logo\/image\/","url":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2021\/12\/logo-text.png","contentUrl":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2021\/12\/logo-text.png","width":256,"height":37,"caption":"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile"},"image":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/hoanghamobilecom"]},{"@type":"Person","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/a7254cd2473ea15c26ef1b1fcd58398c","name":"Daisy Daisy","image":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/image\/","url":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/litespeed\/avatar\/4261b6751d190cb0b62038d948ff8dbb.jpg?ver=1774865089","contentUrl":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/litespeed\/avatar\/4261b6751d190cb0b62038d948ff8dbb.jpg?ver=1774865089","caption":"Daisy Daisy"},"description":"M\u00ecnh l\u00e0 Daisy, m\u1ed9t ng\u01b0\u1eddi d\u00f9ng th\u00edch kh\u00e1m ph\u00e1 c\u00f4ng ngh\u1ec7 v\u00e0 chia s\u1ebb nh\u1eefng tr\u1ea3i nghi\u1ec7m th\u1ef1c t\u1ebf. C\u1ea3m \u01a1n m\u1ecdi ng\u01b0\u1eddi \u0111\u00e3 \u0111\u1ecdc v\u00e0 chia s\u1ebb b\u00e0i vi\u1ebft c\u1ee7a m\u00ecnh nh\u00e9.","sameAs":["https:\/\/www.facebook.com\/hoanghamobilecom"],"url":"https:\/\/hoanghamobile.com\/tin-tuc\/author\/nguyen-bao-ni\/"}]}},"_links":{"self":[{"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/posts\/530208","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/users\/84"}],"replies":[{"embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/comments?post=530208"}],"version-history":[{"count":4,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/posts\/530208\/revisions"}],"predecessor-version":[{"id":530515,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/posts\/530208\/revisions\/530515"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/media\/530410"}],"wp:attachment":[{"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/media?parent=530208"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/categories?post=530208"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/tags?post=530208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}