分式（x²-y²\xy）-（xy-y²\xy-x²）可化简为

分类: 作业答案 • 2021-12-19 22:45:44

问题描述：

答

原式=(x²-y²)/xy+y(x-y)/x(x-y)
=(x²-y²)/xy+y/x
=(x²-y²+y²)/xy
=x²/xy
=x/y