初二因式分解a²(x-y)-b²(x-y)

问题描述:

初二因式分解a²(x-y)-b²(x-y)

(x-y)(a-b)(a+b)

a²(x-y)-b²(x-y)
=(x-y)(a²-b²)
=(x-y)(a-b)(a+b)