约分:(1)2x^2y-2xy^2/x^2-2xy+y^2 (2)25-x^2/x^2-10x+25

问题描述:

约分:(1)2x^2y-2xy^2/x^2-2xy+y^2 (2)25-x^2/x^2-10x+25

   2xy/(x-y)
   (5+x)/(5-x)