问题描述: (x+y+z)(x-y+z)+(y-x+z)(y-x-z)求过程 1个回答 分类:数学 2014-12-07 问题解答: 我来补答 (x+y+z)(x-y+z)+(y-x+z)(y-x-z)=(x+y+z)(x-y+z)-(y-x+z)(x-y+z)=((x+y+z)-(y-x+z))(x-y+z)=(2x)(x-y+z)=2x(x-y+z)如需请追问如无请采纳! 展开全文阅读