已知x-3y=0,且xy不等于0,求分式x*2-xy+y*2/x*2+xy+y*2的值
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![已知x-3y=0,且xy不等于0,求分式x*2-xy+y*2/x*2+xy+y*2的值](/uploads/image/z/567954-18-4.jpg?t=%E5%B7%B2%E7%9F%A5x-3y%3D0%2C%E4%B8%94xy%E4%B8%8D%E7%AD%89%E4%BA%8E0%2C%E6%B1%82%E5%88%86%E5%BC%8Fx%2A2-xy%2By%2A2%2Fx%2A2%2Bxy%2By%2A2%E7%9A%84%E5%80%BC)
已知x-3y=0,且xy不等于0,求分式x*2-xy+y*2/x*2+xy+y*2的值
已知x-3y=0,且xy不等于0,求分式x*2-xy+y*2/x*2+xy+y*2的值
已知x-3y=0,且xy不等于0,求分式x*2-xy+y*2/x*2+xy+y*2的值
x-3y=0
x=3y
x*2-xy+y*2/x*2+xy+y*2
=(9y^2-3y^2+y^2)/(9y^2+3y^2+y^2)
=7y^2/13y^2
=7/13
p