若丨2x+y-1丨+(x-2y)²=0,则x²+xy+y²的值为
若|2x+y-1|+(x-2y)²=0,则x²+xy+y²的值为?
已知y=(x²-3xy-2y²)/2y,则x:y的值为
若m/x²-y²=2xy-y²/x²-y²+x-y/x+y,则m的值为
已知y=x²-3xy-2y²分之2y,则x,y的值为
若x/y=2,则分式x²-y²/xy的值为
已知x=y+3,则代数式x²-2xy+y²的值为
若x/y=2,则分式x²-y²/xy的值为?
4/X+1/Y=2,XY=-1,求代数式4Y-X/X-2Y/(x+2y-12Y²/x-2y)的值
已知x-3y=0,y≠0,求x²-2xy+y²分之2x+y×(x-y)的值
若|2x+2y+3|+(xy-1)²=0,则x³+y³的值为
1/x+1/y=5,求2x-3xy+2y/x²+xy+y的值
设x,y为正数,且满足x²-2xy-y²=0,求x-y\x+y的值.