(x-y)²-8(x-y-2) 因式分解
问题描述:
(x-y)²-8(x-y-2) 因式分解
答
(x-y)^2-8(x-y-2)
=(x-y)^2-8(x-y)+16
=[(x-y)-4]^2
=(x-y-4)^2