若y-2x=0,则分式(x^2+xy+y^2)/(x^2-xy+2y^2)=
若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值
若y-x/xy=3,求分式2x+3xy-2y/x-2xy-y
1若x+2y=0 ,xy不等于0,求分式 x^2+2xy / xy+y^2
已知x+2y=0,求分式2xy+y^2/x^2-xy
若x+2y=0,xy不等于0,求分式x²+2xy/xy+y²的值
已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值.
已知2x-3y=0,求分式x^2+xy-y^2/2x^2+xy-y^2
若X/1-y/1=3 求分式:x-2xy-y/2x+3xy-2y
若实数x,y满足1/x-1/y=5,则分式3x-2xy-3y/x+xy-y的值等于?
若2x=-y,则分式(xy)/(x²-y²)=_____
若x/y=2,则分式x²-y²/xy的值为
若x/y=2则分式x²-y²/xy的值