a²(x-y)-4b²(x-y)
问题描述:
a²(x-y)-4b²(x-y)
答
=(x-y)(a²-4b²)
=(x-y)(a+2b)(a-2b)
a²(x-y)-4b²(x-y)
=(x-y)(a²-4b²)
=(x-y)(a+2b)(a-2b)