{"common":{"save":0,"post_id":"7829","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7668","post_id":"7829","mon_id":"1159278","chapter_id":"1159282","question":"<p>Trong c&aacute;c ph\u01b0\u01a1ng tr&igrave;nh sau, \u0111&acirc;u l&agrave; ph\u01b0\u01a1ng tr&igrave;nh t&iacute;ch?<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$x(x-4)=2(x-4)$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$2x(x+5)(2x-1)=0$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$5x(5x+1)=1$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$(2x-3)(2-x)=(2-x)(x+7)$<\/span>"],"correct":"2","level":"1","hint":"<p>Ph\u01b0\u01a1ng tr&igrave;nh t&iacute;ch c&oacute; d\u1ea1ng A.B.C = 0.<\/p>","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong>&nbsp;<span class=\"math-tex\">$2x(x+5)(2x-1)=0$<\/span>.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-13 01:06:04","option_type":"math","len":0},{"id":"7669","post_id":"7829","mon_id":"1159278","chapter_id":"1159282","question":"<p>S\u1ed1 nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr&igrave;nh&nbsp;<span class=\"math-tex\">$2x(x-1)(2-x)=0$<\/span>&nbsp;l&agrave;<\/p>","options":["<strong>A.<\/strong> 0","<strong>B.<\/strong> 4","<strong>C.<\/strong> 2","<strong>D.<\/strong> 3"],"correct":"4","level":"1","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong> 3.<\/span><\/p><p><span class=\"math-tex\">$2x(x-1)(2-x)=0$<\/span><\/p><p><span class=\"math-tex\">$2x=0$<\/span>&nbsp;ho\u1eb7c&nbsp;<span class=\"math-tex\">$x-1=0$<\/span>&nbsp;ho\u1eb7c&nbsp;<span class=\"math-tex\">$2-x=0$<\/span><\/p><p>&nbsp;&nbsp;<span class=\"math-tex\">$x=0$<\/span>&nbsp;ho\u1eb7c&nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$x=1$<\/span>&nbsp; &nbsp; ho\u1eb7c&nbsp;<span class=\"math-tex\">$x=2$<\/span><\/p><p>V\u1eady ph\u01b0\u01a1ng tr&igrave;nh c&oacute; 3 nghi\u1ec7m.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-13 01:09:24","option_type":"txt","len":0},{"id":"7670","post_id":"7829","mon_id":"1159278","chapter_id":"1159282","question":"<p>Ph\u01b0\u01a1ng tr&igrave;nh&nbsp;<span class=\"math-tex\">$x(x-5)(2x+4)=0$<\/span>&nbsp;c&oacute; t\u1eadp&nbsp;nghi\u1ec7m l&agrave;<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$S=\\{0;-2;-5\\}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$S=\\{-2;2;5\\}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$S=\\{0;5;-2\\}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$S=\\{0;5;2\\}$<\/span>"],"correct":"3","level":"1","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><\/span><span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$S=\\{0;5;-2\\}$<\/span>.<\/span><\/p><p><span class=\"math-tex\">$x(x-5)(2x+4)=0$<\/span><\/p><p><span class=\"math-tex\">$x=0$<\/span>&nbsp;ho\u1eb7c&nbsp;<span class=\"math-tex\">$x-5=0$<\/span>&nbsp;ho\u1eb7c&nbsp;<span class=\"math-tex\">$2x+4=0$<\/span><\/p><p><span class=\"math-tex\">$x=0$<\/span>&nbsp;ho\u1eb7c&nbsp;<span class=\"math-tex\">$x=5$<\/span>&nbsp;ho\u1eb7c&nbsp;<span class=\"math-tex\">$x=-2$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-13 01:12:11","option_type":"math","len":0}]}