_____/xy=2y/2xy² 填空 分式
若2x=-y,则分式(xy)/(x²-y²)=_____
若x+2y=0,xy不等于0,求分式x²+2xy/xy+y²的值
分式化简 xy-5y/10y+2xy
若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值
已知x-y/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
x+2y=0(x≠0),求分式x²-xy分之2xy+y²
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
1若x+2y=0 ,xy不等于0,求分式 x^2+2xy / xy+y^2
请你先化简分式x²-2xy+y²/x²-xy÷(xy的-1次方-x的-1次方y),再将x=
若x/y=2,则分式x²-y²/xy的值为