化简:x²+y-2倍根号y-2x+2
{(x-y)/(根号x+根号y)}-(x+y-2倍根号xy)/(根号x-根号y)=?
化简:x²+y-2倍根号y-2x+2
化简:((根号x-根号y)^3+2x根号x+y根号y)/(x根号x+y根号y)+(3根号xy-3y)/(x-y)
化简5y/2x倍根号1/y的平方-x/y的立方 (y>x>0)
已知x =2y 化简(根号y/根号x -根号y )-(根号y/根号x +根号y)
已知x=2y,化简:根号y/根号x -根号y -根号y/根号x +根号y
``(x-2倍根号xy+y)(根号x +根号y)
已知x>0,y>0,(根号x)×(根号x+2倍根号y)=(根号y)×(6倍根号x+5倍根号y),求 x+根号xy-y
化简:(x-y)除以(根号x+根号y)-(x-2根号xy+y)除以(根号x-根号y)
根号xy 除以 2倍根号x分之y^2
已知,x=484,y=2.56,求x+y-2倍根号xy、根号x-根号y
已知根号x(根号x-根号y)=根号xy+3y,求(3x-y)分之2x+3倍根号xy-y 的值