问题描述: (m-n)(3m-n)²+(m+3n)²(n-m)今晚就要!帮帮偶! 1个回答 分类:数学 2014-10-15 问题解答: 我来补答 (m-n)(3m-n)²+(m+3n)²(n-m)=(m-n)(3m-n)²+[-(m+3n)²(m-n)]=(m-n)(3m-n)²-(m+3n)²(m-n)=(m-n)[(3m-n)²-(m+3n)²]=(m-n)[(3m-n)+(m+3n)][(3m-n)-(m+3n)]=(m-n)(4m+2n)(2m-4n)=4(m-n)(2m+n)(m-2n) 展开全文阅读