已知7 x^2 + 5y x^2=12xy,并且xy不等于0,则可求出()的值
1个回答
抄错题了吧?如果原题是7x^2 + 5y^2=12xy
则7x^2+5y^2-12xy=0
(7x-5y)(x-y)=0
可得x/y=5/7或x/y=1
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