xy-y^2-yz+xz怎么做
问题描述：
xy-y^2-yz+xz怎么做
答
xy-y²-yz+xz=y(x-y)+z(x-y)
=(x-y)(y+z)
xy-y^2-yz+xz怎么做
xy-y²-yz+xz=y(x-y)+z(x-y)
=(x-y)(y+z)