{"common":{"save":0,"post_id":"5813","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8529","post_id":"5813","mon_id":"1158532","chapter_id":"1158660","question":"<p>T&iacute;nh&nbsp;<span class=\"math-tex\">$(-0,5x).(2,4x^2-4x-3,6)$<\/span><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$-1,2x^3-2 x^2+1,8x$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$1,2x^3+2 x^2+1,8x$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$-1,2x^3+2 x^2+1,8$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$-1,2x^3+2 x^2+1,8x$<\/span>"],"correct":"4","level":"2","hint":"<p>Mu\u1ed1n nh&acirc;n m\u1ed9t \u0111\u01a1n th\u1ee9c v\u1edbi m\u1ed9t \u0111a th\u1ee9c, ta nh&acirc;n \u0111\u01a1n th\u1ee9c v\u1edbi t\u1eebng h\u1ea1ng t\u1eed c\u1ee7a \u0111a th\u1ee9c r\u1ed3i c\u1ed9ng c&aacute;c t&iacute;ch v\u1edbi nhau.<\/p>","answer":"<p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$(-0,5x).(2,4x^2-4x-3,6)$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp;<span class=\"math-tex\">$=(-0,5x).2,4x^2+(-0,5x).(-4x)+(-0,5x).(-3,6)$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp;<span class=\"math-tex\">$=(-0,5)\\space.\\space 2,4\\space.x.x^2+0,5\\space.\\space4\\space.\\space x.x+0,5\\space.\\space3\\space,6\\space.\\space x$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp;<span class=\"math-tex\">$=-1,2x^3+2 x^2+1,8x$<\/span><\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp;<span style=\"color:#16a085;\"><strong>D.&nbsp;<\/strong><span class=\"math-tex\">$-1,2x^3+2 x^2+1,8x$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-06-01 08:27:17","option_type":"math","len":0},{"id":"8532","post_id":"5813","mon_id":"1158532","chapter_id":"1158660","question":"<p>Th\u1ef1c hi\u1ec7n ph&eacute;p nh&acirc;n hai \u0111a th\u1ee9c:<\/p><p><span class=\"math-tex\">$(-x+1).(x-2)$<\/span><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$-x^2+3x-2$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$-x^2+x-2$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$x^2+3x-2$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$x^2+3x+2$<\/span>"],"correct":"1","level":"2","hint":"<p>Mu\u1ed1n nh&acirc;n m\u1ed9t \u0111a th\u1ee9c v\u1edbi m\u1ed9t \u0111a th\u1ee9c, ta nh&acirc;n t\u1eebng h\u1ea1ng t\u1eed c\u1ee7a \u0111a th\u1ee9c n&agrave;y v\u1edbi t\u1eebng h\u1ea1ng t\u1eed c\u1ee7a \u0111a th\u1ee9c kia r\u1ed3i c\u1ed9ng c&aacute;c t&iacute;ch v\u1edbi nhau.<\/p>","answer":"<p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$(-x+1).(x-2)$<\/span><\/p><p>&nbsp; &nbsp;<span class=\"math-tex\">$=(-x).x+(-x).(-2)+1.x+1.(-2)$<\/span><\/p><p>&nbsp; &nbsp;<span class=\"math-tex\">$=-x^2+2x+x-2$<\/span><\/p><p>&nbsp; &nbsp;<span class=\"math-tex\">$=-x^2+(2x+x)-2$<\/span><\/p><p>&nbsp; &nbsp;<span class=\"math-tex\">$=-x^2+3x-2$<\/span><\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp;&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong>&nbsp;<span class=\"math-tex\">$-x^2+3x-2$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-06-01 08:41:27","option_type":"math","len":0},{"id":"8534","post_id":"5813","mon_id":"1158532","chapter_id":"1158660","question":"<p>Th\u1ef1c hi\u1ec7n ph&eacute;p nh&acirc;n hai \u0111a th\u1ee9c:<\/p><p><span class=\"math-tex\">$\\left(\\dfrac{1}{6}x-2\\right ).(-x+1)$<\/span><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{6}x^2+\\dfrac{13}{6}x-2$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$-\\dfrac{1}{6}x^2+\\dfrac{13}{6}x-2$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$-\\dfrac{1}{6}x^2+\\dfrac{1}{6}x-2$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$-\\dfrac{1}{6}x^2-\\dfrac{13}{6}x+2$<\/span>"],"correct":"2","level":"2","hint":"","answer":"<p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$\\left(\\dfrac{1}{6}x-2\\right ).(-x+1)$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$=\\left(\\dfrac{1}{6}x\\right).(-x)+\\left(\\dfrac{1}{6}x\\right).1+(-2).(-x)+(-2).1$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$=-\\dfrac{1}{6}x^2+\\dfrac{1}{6}x+2x-2$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$=-\\dfrac{1}{6}x^2+\\dfrac{13}{6}x-2$<\/span><\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp;&nbsp;<span style=\"color:#16a085;\"><strong>B.&nbsp;<\/strong><span class=\"math-tex\">$-\\dfrac{1}{6}x^2+\\dfrac{13}{6}x-2$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-06-01 08:58:10","option_type":"math","len":0}]}