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_其他解答

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

人气：452 ℃　时间：2019-10-06 23:08:19

解答

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