已知x+2y=0(x不等于0)求分式2xy+y^2/x^2-xy
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已知x+2y=0(x不等于0)求分式2xy+y^2/x^2-xy已知x+2y=0(x不等于0)求分式2xy+y^2/x^2-xy已知x+2y=0(x不等于0)求分式2xy+y^2/x^2-xyx+2y
已知x+2y=0(x不等于0)求分式2xy+y^2/x^2-xy
已知x+2y=0(x不等于0)求分式2xy+y^2/x^2-xy
已知x+2y=0(x不等于0)求分式2xy+y^2/x^2-xy
x+2y=0
x=-2y
2xy+y2/x2-xy
=-4y^2+y^2/4y^2+2y^2=-5/6