因式分解题!(x-y)的三次方-4(x-y)的平方+4(x-y)
问题描述:
因式分解题!(x-y)的三次方-4(x-y)的平方+4(x-y)
(x-y)的三次方-4(x-y)²+4(x-y),
答
(x-y)的三次方-4(x-y)²+4(x-y)
=(x-y)[(x-y)²-4(x-y)+4]
=(x-y)(x-y-2)²