{"common":{"save":0,"post_id":"7779","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7199","post_id":"7779","mon_id":"1159278","chapter_id":"1159282","question":"<p>Ph\u01b0\u01a1ng trình nào sau \u0111ây là ph\u01b0\u01a1ng trình tích?<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$(x-3)(3x+1)=2$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$(x-3)(2x+1)=(x-3)$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$3x^2+6x=0$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$(x-5)(x+1)=0$<\/span>"],"correct":"4","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> <span class=\"math-tex\">$(x-5)(x+1)=0$<\/span><\/span><\/p><p>Ph\u01b0\u01a1ng trình <span class=\"math-tex\">$(x-5)(x+1)=0$<\/span> là ph\u01b0\u01a1ng trình tích.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-04 01:27:07","option_type":"math","len":0},{"id":"7200","post_id":"7779","mon_id":"1159278","chapter_id":"1159282","question":"<p>Cho bi\u1ebft ph\u01b0\u01a1ng trình <span class=\"math-tex\">$(x-5)(x+1)=0$<\/span> có bao nhiêu nghi\u1ec7m?<\/p>","options":["<strong>A.<\/strong> 1","<strong>B.<\/strong> 2","<strong>C.<\/strong> 0","<strong>D.<\/strong> 3"],"correct":"2","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> 2<\/span><\/p><p><span class=\"math-tex\">$(x-5)(x+1)=0$<\/span> nên x – 5 = 0 ho\u1eb7c x + 1 = 0<\/p><p> ♦ x – 5 = 0 suy ra x = 5 <\/p><p> ♦ x + 1 = 0 suy ra x = –1<\/p><p>V\u1eady ph\u01b0\u01a1ng trình có 2 nghi\u1ec7m.<\/p>","type":"choose","extra_type":"flower","time":"0","user_id":"127","test":"0","date":"2024-10-04 01:28:59","option_type":"txt","len":0},{"id":"7203","post_id":"7779","mon_id":"1159278","chapter_id":"1159282","question":"<p>Nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng trình (x – 3)(x + 2) = 0 là:<\/p>","options":["<strong>A.<\/strong> x = 3; x = 2","<strong>B.<\/strong> x = –3; x = 2","<strong>C.<\/strong> x = 3; x = –2","<strong>D.<\/strong> x = –3; x = –2"],"correct":"3","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> x = 3; x = –2<\/span><\/p><p>(x – 3)(x + 2) = 0 nên x – 3 = 0 ho\u1eb7c x + 2 = 0<\/p><p>♦ x – 3 = 0 suy ra x = 3<\/p><p>♦ x + 2 = 0 suy ra x = –2<\/p><p>V\u1eady ph\u01b0\u01a1ng trình có 2 nghi\u1ec7m là <span style=\"color:#16a085;\">x = 3; x = –2<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-04 01:32:45","option_type":"txt","len":2}]}
