因式分解:x2(x-y)+y2(y-x)
问题描述:
因式分解:x2(x-y)+y2(y-x)
答
原式=x2(x-y)-y2(x-y)
=(x-y)(x2-y2)
=(x-y)(x+y)(x-y)
=(x-y)2(x+y).
答案解析:根据提取公因式再运用公式,可得答案.
考试点:提公因式法与公式法的综合运用.
知识点:本题考查了因式分解,先提取公因式,再运用公式法分解因式.