{"common":{"save":0,"post_id":"6542","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5784","post_id":"6542","mon_id":"1158921","chapter_id":"1158927","question":"<p>Tính t\u1ed5ng các h\u1ec7 s\u1ed1 c\u1ee7a các h\u1ea1ng t\u1eed trong \u0111a th\u1ee9c M, bi\u1ebft M là tích c\u1ee7a \u0111a th\u1ee9c x – 5y + z v\u1edbi \u0111\u01a1n th\u1ee9c –3x .<\/p>","options":["<strong>A.<\/strong> –9","<strong>B.<\/strong> –15","<strong>C.<\/strong> 6","<strong>D.<\/strong> 9"],"correct":"4","level":"2","hint":"","answer":"<p>M = (x – 5y + z) . (–3x)<\/p><p>M = –3x² + 15xy –3xz<\/p><p>T\u1ed5ng các h\u1ec7 s\u1ed1 c\u1ee7a các h\u1ea1ng t\u1eed c\u1ee7a M là –3 + 15 + (–3) = 9.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>D.<\/strong> 9.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-02 04:21:56","option_type":"txt","len":1},{"id":"5785","post_id":"6542","mon_id":"1158921","chapter_id":"1158927","question":"<p>Tính t\u1ed5ng các h\u1ec7 s\u1ed1 c\u1ee7a các h\u1ea1ng t\u1eed trong \u0111a th\u1ee9c M, bi\u1ebft M là th\u01b0\u01a1ng c\u1ee7a phép chia \u0111a th\u1ee9c –5x²y²z³ + 20xy³ cho \u0111\u01a1n th\u1ee9c –5xy .<\/p>","options":["<strong>A.<\/strong> –3","<strong>B.<\/strong> 3","<strong>C.<\/strong> –5","<strong>D.<\/strong> 5"],"correct":"1","level":"2","hint":"","answer":"<p>M = (–5x²y²z³ + 20xy³) : (–5xy)<\/p><p>M = xyz³ – 4y²<\/p><p>T\u1ed5ng các h\u1ec7 s\u1ed1 c\u1ee7a các h\u1ea1ng t\u1eed c\u1ee7a M là 1 + (–4) = –3.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> –3.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-02 04:26:13","option_type":"txt","len":1},{"id":"5791","post_id":"6542","mon_id":"1158921","chapter_id":"1158927","question":"<p>Tính tích các h\u1ec7 s\u1ed1 c\u1ee7a các h\u1ea1ng t\u1eed trong \u0111a th\u1ee9c M bi\u1ebft M là th\u01b0\u01a1ng trong phép chia \u0111a th\u1ee9c 6x²y³z – 9x³y²z² cho \u0111\u01a1n th\u1ee9c –3x²y²z .<\/p>","options":["<strong>A.<\/strong> 6","<strong>B.<\/strong> –6","<strong>C.<\/strong> –3","<strong>D.<\/strong> 1"],"correct":"2","level":"2","hint":"","answer":"<p>M = (6x²y³z – 9x³y²z²) : (–3x²y²z)<\/p><p>M = –2y + 3xz<\/p><p>Tích các h\u1ec7 s\u1ed1 c\u1ee7a các h\u1ea1ng t\u1eed trong \u0111a th\u1ee9c M là –2 . 3 = –6 .<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B.<\/strong> –6.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-02 05:00:40","option_type":"txt","len":1}]}
