若y-2x=0,则分式(x^2+xy+y^2)/(x^2-xy+2y^2)=

若y-2x=0,则分式(x^2+xy+y^2)/(x^2-xy+2y^2)= 若分式xy/x+y中的x,y都扩大2倍,则分式的值 1若x+2y=0 ,xy不等于0,求分式 x^2+2xy / xy+y^2 若x+2y=0,xy不等于0,求分式x²+2xy/xy+y²的值 若x²+y²+6x-2y+10=0 则分式x-2y/x³-4x²y+4xy²的值 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 若2x=-y,则分式(xy)/(x²-y²)=_____ 若x/y=2则分式x²-y²/xy的值 若x/y=2,则分式x²-y²/xy的值为? 若x/y=2,则分式x²-y²/xy的值为 分式题若1/x+1/y=2,则分式2x+3xy+2y/x-xy+y的值是 已知x+2y=0,求分式2xy+y^2/x^2-xy 若（x-4y）(x+3y)=0 且xy＞0 则分式x+3y/2x-y的值为 若x+y-2x-6y+10=0,则分式x-y／x-2xy+y的值为 数学分式计算若x^2+xy-2y^2=0,则(x^2+3xy+3y^2)/(x^2+y^2)=( ) 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? 已知2x-3y=0,求分式x^2+xy-y^2/2x^2+xy-y^2