x+3y=0,xy≠0,则分式(x^2-3xy)/(xy+y^2)的值是

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x+3y=0,xy≠0,则分式(x^2-3xy)/(xy+y^2)的值是
x)65Щ|Թ@i̧mOkTWTjkTTjW|Vӆ=fI*'O~ v>Tg~O%PZF_CbM[]K<;]6`γOv/~ں@#Uƙ`Sc`

x+3y=0,xy≠0,则分式(x^2-3xy)/(xy+y^2)的值是
x+3y=0,xy≠0,则分式(x^2-3xy)/(xy+y^2)的值是

x+3y=0,xy≠0,则分式(x^2-3xy)/(xy+y^2)的值是
原式=(9y^2+9y^2)/(-3y^2+y^2)=-9

我代入解的是-36y^4

9

-9