化简 x-y+(2y²)/(x+y)

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化简x-y+(2y²)/(x+y)化简x-y+(2y²)/(x+y)化简x-y+(2y²)/(x+y)=[(x-y)(x+y)+2y²]/(x+y)=(x

化简 x-y+(2y²)/(x+y)
化简 x-y+(2y²)/(x+y)

化简 x-y+(2y²)/(x+y)
=[(x-y)(x+y)+2y²]/(x+y)
=(x²+y²)/(x+y)