问题描述: 四分之一(x+y)²-3(x-y)³+二分之一(x+y)²-5(x-y)³= 1个回答 分类:数学 2014-11-28 问题解答: 我来补答 =(1/4+1/2)(x+y)²+(-3-5)(x-y)³=3/4(x+y)²-8(x-y)³=[3/4-8(x-y)](x+y)²=(3/4-8x+8y)(x+y)² 展开全文阅读