若x+2y=0,xy不等于0,求分式xy+y^2分之x^2+2xy的值

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若x+2y=0,xy不等于0,求分式xy+y^2分之x^2+2xy的值若x+2y=0,xy不等于0,求分式xy+y^2分之x^2+2xy的值若x+2y=0,xy不等于0,求分式xy+y^2分之x^2+

若x+2y=0,xy不等于0,求分式xy+y^2分之x^2+2xy的值
若x+2y=0,xy不等于0,求分式xy+y^2分之x^2+2xy的值

若x+2y=0,xy不等于0,求分式xy+y^2分之x^2+2xy的值
若x+2y=0,xy不等于0,求分式xy+y^2分之x^2+2xy的值
x+2y=0,x=-2y
x^2+2xy /xy+y^2=(4y^2-4y^2)/xy+y^2=0