(x-y)的立方乘(y-x)的七次方=-(x-y)——

问题描述:

(x-y)的立方乘(y-x)的七次方=-(x-y)——

(x-y)的立方乘(y-x)的七次方=-(x-y)的10次方
(x-y)^3*(y-x)^7=(x-y)^3*[-(x-y)^7]=-(x-y)^(3+7)=-(x-y)^10