(x-y)(y-x)的二次方(x-y)的三次方等于多少
问题描述:
(x-y)(y-x)的二次方(x-y)的三次方等于多少
答
解
(x-y)(y-x)²(x-y)³
=(x-y)(x-y)²(x-y)³
=(x-y)^6