计算:(x²+y²)(x²-y²)-x²(x+y)(x-y)
问题描述:
计算:(x²+y²)(x²-y²)-x²(x+y)(x-y)
答
原式=﹙x²-y²﹚﹙x²+y²-x²﹚
=x²﹙x-y﹚﹙x+y﹚.