2xy/(x*x+y*y) 和 x/x*x-y*y(x平方就用x*x,y的平方用y*y)怎么通分 请写出过程

问题描述:

2xy/(x*x+y*y) 和 x/x*x-y*y(x平方就用x*x,y的平方用y*y)怎么通分 请写出过程

2xy(x²-y²)/(x²+y²)(x²-y²)=(2x³y-2xy³)/(x²+y²)(x²-y²)x(x²+y²)/(x²+y²)(x²-y²)=(x³+xy²)/(x²+y&sup2...