(x+y+z)(x-y+z)+(y-x+z)(y-x-z)求过程

问题描述:

(x+y+z)(x-y+z)+(y-x+z)(y-x-z)求过程

(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!