(m+n)(m-n)+(m+n)的平方-2m的平方因式分解
人气：165 ℃ 时间：2020-04-08 01:48:03
解答
(m+n)(m-n)+(m+n)的平方-2m的平方
=m²-n²+m²+2mn+n²-2m²
=2mn因式分解最后结果是2mn,无法分解因式
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