{"common":{"save":0,"post_id":"6556","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5956","post_id":"6556","mon_id":"1158921","chapter_id":"1158928","question":"<p>\u0110\u1eb3ng th\u1ee9c nào sau \u0111ây là <strong>sai<\/strong>?<\/p>","options":["<strong>A.<\/strong> x³ – y³ = (x – y)(x² + xy + y²)","<strong>B.<\/strong> x³ + y³ = (x + y)(x² + xy + y²)","<strong>C.<\/strong> (x + y)³ = x³ + 3x²y + 3xy² + y³","<strong>D.<\/strong> (x – y)³ = x³ – 3x²y + 3xy² – y³"],"correct":"2","level":"1","hint":"","answer":"<p>\u0110\u1eb3ng th\u1ee9c <strong>sai <\/strong>là <span style=\"color:#16a085;\"><strong>B.<\/strong> x³ + y³ = (x + y)(x² + xy + y²).<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-09 04:23:41","option_type":"txt","len":3},{"id":"5957","post_id":"6556","mon_id":"1158921","chapter_id":"1158928","question":"<p>Phân tích \u0111a th\u1ee9c thành nhân t\u1eed 25x²y – 15xy² + 10xy .<\/p>","options":["<strong>A.<\/strong> 5xy(5x – 3y + 2)","<strong>B.<\/strong> 5xy(5x + 3y – 2)","<strong>C.<\/strong> 5xy(5x – 3y – 2)","<strong>D.<\/strong> 5xy(5x + 3y + 2)"],"correct":"1","level":"1","hint":"<p>Phân tích \u0111a th\u1ee9c thành nhân t\u1eed b\u1eb1ng cách \u0111\u1eb7t nhân t\u1eed chung.<\/p>","answer":"<p>25x²y – 15xy² + 10xy<\/p><p>= 5xy(5x – 3y + 2)<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> 5xy(5x – 3y + 2).<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-09 04:28:49","option_type":"txt","len":2},{"id":"5958","post_id":"6556","mon_id":"1158921","chapter_id":"1158928","question":"<p>Phân tích \u0111a th\u1ee9c thành nhân t\u1eed x²y – xy + 3xy².<\/p>","options":["<strong>A.<\/strong> xy(x + 1 + 3y)","<strong>B.<\/strong> x(x – 1 – 3y)","<strong>C.<\/strong> y(x + 1 – 3y)","<strong>D.<\/strong> xy(x – 1 + 3y)"],"correct":"4","level":"1","hint":"<p>Phân tích \u0111a th\u1ee9c thành nhân t\u1eed b\u1eb1ng cách \u0111\u1eb7t nhân t\u1eed chung.<\/p>","answer":"<p>x²y – xy + 3xy²<\/p><p>= xy(x – 1 + 3y)<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>D.<\/strong> xy(x – 1 + 3y).<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-09 04:31:16","option_type":"txt","len":2}]}
