{"common":{"save":0,"post_id":"7830","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7683","post_id":"7830","mon_id":"1159278","chapter_id":"1159282","question":"<p>Nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng trình <span class=\"math-tex\">$x(x-5)+2(x-5)=0$<\/span> là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$x=2;x=5$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$x=-2;x=5$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$x=2;x=-5$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$x=-2;x=-5$<\/span>"],"correct":"2","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> <span class=\"math-tex\">$x=-2;x=5$<\/span>.<\/span><\/p><p><span class=\"math-tex\">$x(x-5)+2(x-5)=0$<\/span><\/p><p><span class=\"math-tex\">$(x-5)(x+2)=0$<\/span><\/p><p><span class=\"math-tex\">$x-5=0$<\/span> ho\u1eb7c <span class=\"math-tex\">$x+2=0$<\/span><\/p><p><span class=\"math-tex\">$x=5$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=-2$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-13 01:44:26","option_type":"math","len":0},{"id":"7684","post_id":"7830","mon_id":"1159278","chapter_id":"1159282","question":"<p>Ph\u01b0\u01a1ng trình <span class=\"math-tex\">$(2x-1)(x+2)=2(x+2)$<\/span> có nghi\u1ec7m là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$x=-2$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=\\dfrac{3}{2}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$x=2$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=\\dfrac{3}{2}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$x=-2$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=-\\dfrac{3}{2}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$x=2$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=-\\dfrac{3}{2}$<\/span>"],"correct":"1","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$x=-2$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=\\dfrac{3}{2}$<\/span>.<\/span><\/p><p><span class=\"math-tex\">$(2x-1)(x+2)=2(x+2)$<\/span><\/p><p><span class=\"math-tex\">$(2x-1)(x+2)-2(x+2)=0$<\/span><\/p><p><span class=\"math-tex\">$(x+2)(2x-1-2)=0$<\/span><\/p><p><span class=\"math-tex\">$(x+2)(2x-3)=0$<\/span><\/p><p><span class=\"math-tex\">$x+2=0$<\/span> ho\u1eb7c <span class=\"math-tex\">$2x-3=0$<\/span><\/p><p><span class=\"math-tex\">$x=-2$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=\\dfrac{3}{2}$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-13 01:48:55","option_type":"math","len":0},{"id":"7687","post_id":"7830","mon_id":"1159278","chapter_id":"1159282","question":"<p>Ph\u01b0\u01a1ng trình <span class=\"math-tex\">$(x-6)^2=(x+2)(6-x)$<\/span> có nghi\u1ec7m là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$x=6$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=-2$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$x=-6$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=2$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$x=6$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=2$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$x=-6$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=-2$<\/span>"],"correct":"3","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> <span class=\"math-tex\">$x=6$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=2$<\/span>.<\/span><\/p><p><span class=\"math-tex\">$(x-6)^2=(x+2)(6-x)$<\/span><\/p><p><span class=\"math-tex\">$(x-6)^2+(x+2)(x-6)=0$<\/span><\/p><p><span class=\"math-tex\">$(x-6)(x-6+x+2)=0$<\/span><\/p><p><span class=\"math-tex\">$(x-6)(2x-4)=0$<\/span><\/p><p><span class=\"math-tex\">$x-6=0$<\/span> ho\u1eb7c <span class=\"math-tex\">$2x-4=0$<\/span><\/p><p><span class=\"math-tex\">$x=6$<\/span> ho\u1eb7c <span class=\"math-tex\">$x=2$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-13 02:09:26","option_type":"math","len":0}]}