(x-y)的平方-(x-y)的3次方(用分解因式计算)
问题描述:
(x-y)的平方-(x-y)的3次方(用分解因式计算)
答
(x-y)²-(x-y)³
=(x-y)²[1-(x-y)]
=(x-y)²(1-x+y)