分式的基本性质x^2-y^2/(x+y)^2=x-y/( )

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分式的基本性质x^2-y^2/(x+y)^2=x-y/()分式的基本性质x^2-y^2/(x+y)^2=x-y/()分式的基本性质x^2-y^2/(x+y)^2=x-y/()x^2-y^2/(x+y)

分式的基本性质x^2-y^2/(x+y)^2=x-y/( )
分式的基本性质x^2-y^2/(x+y)^2=x-y/( )

分式的基本性质x^2-y^2/(x+y)^2=x-y/( )
x^2-y^2/(x+y)^2=x-y/(x+y )