x^2-7xy+12y^2=0(y不等于0),求x:y的值越快越好,

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x^2-7xy+12y^2=0(y不等于0),求x:y的值越快越好,
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x^2-7xy+12y^2=0(y不等于0),求x:y的值越快越好,
x^2-7xy+12y^2=0(y不等于0),求x:y的值
越快越好,

x^2-7xy+12y^2=0(y不等于0),求x:y的值越快越好,
x^2-7xy+12y^2=0(y不等于0),(x-3y)(x-4y)=0,x=3y或x=4y,所以x:y=3或4