a²(x-y)+4b²(y-x)怎么因式分解?谢谢
问题描述:
a²(x-y)+4b²(y-x)怎么因式分解?谢谢
答
a²(x-y)+4b²(y-x)
=a²(x-y)-4b²(x-y)
=(x-y)(a²-4b²)
=(x-y)(a+2b)(a-2b)