4x-y/2根号x+根号y 9x-6根号xy+y/3根号x-根号y
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)
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
【(x-y)^3(x^1/2+y^1/2)^-3+3(x根号y-y根号x)】/(x根号x+y根号y)+(2xy根号xy-
已知y=根号1-x+根号x-1+3,求根号x+根号y分之x+2根号xy+y+根号x-根号y分之一的值
{(x-y)/(根号x+根号y)}-(x+y-2倍根号xy)/(根号x-根号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)
代数式求值.已知x=2,y=根号3,求 (根号x-根号y)/(根号x+根号y)+(根号x+根号y)/(根号x-根号y)
已知4x2+9y-4x-6y+2=0 求根号y/根号x+根号y - 根号y/根号x-根号y
根号X(根号X-根号Y)=3根号Y(5根号Y-根号X),求(2X-根号XY+3Y)/X+根号XY-6Y
化简:5根号X^3Y-2Y根号XY-6根号XY+根号X分之Y+根号Y分之X
①{(x+y)/(根号x+根号y)}+{2xy/根号xy(根号x+根号y)}
已知y=根号(x-8)+根号(8-x)+18,求代数式[(x+y)/(根号x+根号y)]-2xy/(x根号y-y根号x)