问题描述: 分解因式 1、16[(x+y)的平方]-25[(x-y)的平方] 2、[(5m方+3n方)的平方]-[(3m方+5n方)的平方] 1个回答 分类:数学 2014-09-22 问题解答: 我来补答 16[(x+y)²]-25[(x-y)²] =[4(x+y)+5(x-y)][4(x+y)-5(x-y)] =(9x-y)(9y-x)[(5m²+3n²)²]-[(3m²+5n²)²] =[(5m²+3n²)+(3m²+5n²)][(5m²+3n²)-(3m²+5n²)] =(8m²+8n²)(2m²-2n²) =[8(m²+n²)][2(m²-n²)] =16(m²+n²)(m+n)(m-n) 展开全文阅读