(x-y)^5除以(y-x)^3等于几

问题描述:

(x-y)^5除以(y-x)^3等于几

= [-(y-x)]^5÷(y-x)^3
= --(y-x)^5÷(y-x)^3
= -(y-x)^(5-3)
= -(y-x)²