问题描述: 因式分解(3m²-n²)-(m²-3n²)²要过程 1个回答 分类:数学 2014-10-22 问题解答: 我来补答 (3m²-n²)²-(m²-3n²)²用平方差公式(3m²-n²)²-(m²-3n²)²=[(3m²-n²)-(m²-3n²)] [(3m²-n²) + (m²-3n²)]= [2 (m²+n² )] [4 m²-4 n²]= [2 (m²+n²)] [ 4( m- n) (m+n)]= 8 ( m- n) (m+n) (m²+n² ) 展开全文阅读