化简：(x+y)÷(√x-√y)-2xy÷(x√y-y√x)

(x+y)÷(√x-√y)-2xy÷(x√y-y√x) =(x+y)/(√x-√y)-2xy/[√x√y(√x-√y)=(x+y)/(√x-√y)-2√x√y/(√x-√y)=(x+y-2√x√y)/(√x-√y)=(√x-√y)^2/(√x-√y)=√x-√y