xz-yz-x方+2xy-y方 因式分解
问题描述：
xz-yz-x方+2xy-y方 因式分解
答
原式=z(x-y)-(x-y)^2
=(x-y)(z-x+y).
答
xz-yz-x方+2xy-y方
=（x-y）z-（x-y）方
=（x-y)(z-x+y)
答
xz-yz-x²+2xy-y²=z(x-y)-(x-y)²=(x-y)(z-x+y)
答
xz-yz-x方+2xy-y=(x-y)z-(x^2-2xy+y^2)=(x-y)z-(x-y)^2=(x-y)(z-x+y)