x^2-2xy-xz+yz+y^2如题,计算
问题描述:
x^2-2xy-xz+yz+y^2
如题,计算
答
原式=(x-y)2-z(x-y)=(x-y)(x-y-z)
x^2-2xy-xz+yz+y^2
如题,计算
原式=(x-y)2-z(x-y)=(x-y)(x-y-z)