若m/x²-y²=2xy-y²/x²-y²+x-y/x+y,则m的值为
若m/x²-y²=2xy-y²/x²-y²+x-y/x+y,则m的值为
若M/x²-y²-x-y/x+y=2xy-y²/x²-y²求M的值
若|2x+y-1|+(x-2y)²=0,则x²+xy+y²的值为?
若正数x,y满足x²-y²=2xy,求(x-y)/(x+y)的值
已知y=x²-3xy-2y²分之2y,则x,y的值为
已知y=(x²-3xy-2y²)/2y,则x:y的值为
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?
已知(x-2y)=y(2y-x),则x²-y²/xy的值是?
正数x,y满足x²-y²=2xy,求x-y/x+y的值
已知M=2xy/x²-y² ,N=x²+y²/x²-y² .
4/X+1/Y=2,XY=-1,求代数式4Y-X/X-2Y/(x+2y-12Y²/x-2y)的值