(y²-x²)/[2(y²-xy)]化简成(y+x)/(2y)对?

问题描述:

(y²-x²)/[2(y²-xy)]化简成(y+x)/(2y)对?

(y²-x²)/[2(y²-xy)]
=[(y+x)(y-x)]/[2y(y-x)]
=(y+x)/(2y)
对的.