化简(x√x+x√y)/(xy-y^2)-(x+√xy+y)/(x√x-y√y)
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(x√x+x√y)/(xy-y^2)-(x+√xy+y)/(x√x-y√y)
=x(√x+√y)/y(x-y)-(x+√xy+y)/[(√x-√y))(x+√xy+y)]
=x(√x+√y)/[y(√x+√y)(√x-√y)]-(x+√xy+y)/[(√x-√
y)(x+√xy+y)]
=x/[y(√x-√y)]-1/[√x-√y]
=[x-y]/[√x-√y]
=[(√x+√y)(√x-√y)]/[√x-√y)]
=√x+√y
=x(√x+√y)/y(x-y)-(x+√xy+y)/[(√x-√y))(x+√xy+y)]
=x(√x+√y)/[y(√x+√y)(√x-√y)]-(x+√xy+y)/[(√x-√
y)(x+√xy+y)]
=x/[y(√x-√y)]-1/[√x-√y]
=[x-y]/[√x-√y]
=[(√x+√y)(√x-√y)]/[√x-√y)]
=√x+√y
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