已知x+2y=0(x不等于0)求分式2xy+y^2/x^2-xy
已知x+2y=0(x不等于0)求分式2xy+y^2/x^2-xy
已知x-3y=0,且xy不等于0,求分式x*2-xy+y*2/x*2+xy+y*2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
已知x+2y=0(x不等于0)求分式2xy+y2/x2-xy
初二数学分式化简已知x-3y=0(xy不等于0),求【(2x+y)/(x²-2xy+y²)】*(x-
3x+4y=0 x不等于0 求分式2xy+y²/x²-xy
已知x+2y=0,求分式2xy+y^2/x^2-xy
已知x^2+xy-2y^2=0 (x不等于0,y不等于0),求x/y-y/x-(x^2+y^2)/xy的值
已知3X+4Y=0(X不等于0),求分式2XY+Y的平方/X的平方-xy的值
已知2x-3y=0,求分式x^2+xy-y^2/2x^2+xy-y^2
已知x^2-xy+3y^2=0 且xy不等于0 求x/y+y/x 的值