x-y / 5y= (y-x)^2 / ( )

分类: 作业答案 • 2021-12-20 12:08:02

问题描述：

答

x-y / 5y= (y-x)^2 / [5y(x-y)]

答

x-y / 5y=(x-y)(x-y)/(5y(x-y))=(y-x)^2 / (5y(x-y) )