{"common":{"save":0,"post_id":"6557","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5973","post_id":"6557","mon_id":"1158921","chapter_id":"1158928","question":"<p>Phân tích \u0111a th\u1ee9c thành nhân t\u1eed 9x²y – 100y .<\/p>","options":["<strong>A.<\/strong> (3x – 10)(3x + 10)","<strong>B.<\/strong> y(3x – 10)(3x + 10)","<strong>C.<\/strong> (3xy – 5)(3xy + 5)","<strong>D.<\/strong> (3xy – 10)(3xy + 10)"],"correct":"2","level":"2","hint":"","answer":"<p>9x²y – 100y<\/p><p>= y(9x² – 100)<\/p><p>= y[(3x)² – 10²]<\/p><p>= y(3x – 10)(3x + 10)<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B.<\/strong> y(3x – 10)(3x + 10).<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-16 03:34:09","option_type":"txt","len":2},{"id":"5974","post_id":"6557","mon_id":"1158921","chapter_id":"1158928","question":"<p>Phân tích \u0111a th\u1ee9c thành nhân t\u1eed xz – z + 3x – 3 .<\/p>","options":["<strong>A.<\/strong> (x – 1)(z + 3)","<strong>B.<\/strong> (x + 1)(z – 3)","<strong>C.<\/strong> (x – 1)(z – 3)","<strong>D.<\/strong> (x + 1)(z + 3)"],"correct":"1","level":"2","hint":"","answer":"<p>xz – z + 3x – 3<\/p><p>= (xz – z) + (3x – 3)<\/p><p>= z(x – 1) + 3(x – 1)<\/p><p>= (x – 1)(z + 3)<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> (x – 1)(z + 3).<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-16 03:39:53","option_type":"txt","len":2},{"id":"5976","post_id":"6557","mon_id":"1158921","chapter_id":"1158928","question":"<p>Phân tích \u0111a th\u1ee9c thành nhân t\u1eed 8y + 12xy + 6x²y + x³y .<\/p>","options":["<strong>A.<\/strong> (2y + x)³","<strong>B.<\/strong> y(x – 2)³","<strong>C.<\/strong> y(2 + x)³","<strong>D.<\/strong> y(2 – x)³"],"correct":"3","level":"2","hint":"","answer":"<p>8y + 12xy + 6x²y + x³y<\/p><p>= y(8 + 12x + 6x² + x³)<\/p><p>= y(2³ + 3.2².x + 3.2.x² + x³)<\/p><p>= y(2 + x)³<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>C.<\/strong> y(2 + x)³.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-16 03:43:51","option_type":"txt","len":2}]}
