分式的通分：2xy/(x+y)^2与x/(x^2+y^2)分式通分,
问题描述：
分式的通分：2xy/(x+y)^2与x/(x^2+y^2)分式通分,
答
2xy/(x+y)²=2xy(x²+y²)/[(x+y)²(x²+y²)]
x/(x²+y²)=x(x+y)²/[(x+y)²(x²+y²)]最简公分母是什么?[(x+y)²(x²+y²)]需要展开吗？