化简:(x+y)÷(√x-√y)-2xy÷(x√y-y√x)答得好有赏!

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化简:(x+y)÷(√x-√y)-2xy÷(x√y-y√x)答得好有赏!

化简:(x+y)÷(√x-√y)-2xy÷(x√y-y√x)答得好有赏!
化简:(x+y)÷(√x-√y)-2xy÷(x√y-y√x)
答得好有赏!

化简:(x+y)÷(√x-√y)-2xy÷(x√y-y√x)答得好有赏!
(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

(x+y)÷( √x-√y )-2xy÷(x√y-y√x)
=(x+y)(√x+√y )/(x-y)-2(xy(x√y+y√x)/(x^2y-y^2x)
=√x-√y
(分母有理化)