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(m+2n)-6(m+2n)(2m-n)+9(n-2m) 因式分解
人气:203 ℃ 时间:2020-03-23 01:00:07
解答
(m+2n)-6(m+2n)(2m-n)+9(n-2m) =[m+2n+3(n-2m)]^2 =(5n-5m)^2 =25(n-m)^2
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