(x-3)^2+2xy+2y^2=0 求x/y

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(x-3)^2+2xy+2y^2=0 求x/y
(x-3)^2+2xy+2y^2=0 求x/y

(x-3)^2+2xy+2y^2=0 求x/y
令a=X/Y 则X=aY .(1)
化简得
X2-6X+9+2XY+2Y2=0 .(2)
将（1）带入（2）得
a2Y2-6aY+9+2aY2+2Y2=0
(a2+2a+2) Y2-6aY+9=0
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