{化简} [x+y/(根号x+根号y)]+[2xy/x·根号y+y·根号x]
{化简} [x+y/(根号x+根号y)]+[2xy/x·根号y+y·根号x]
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
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)
化简x十Y/根号x十根号y十2Xy/x根号y十y根号x
{(x-y)/(根号x+根号y)}-(x+y-2倍根号xy)/(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)
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-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-
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)
化简(y根号x+x根号y)/(xy-y²)-(x+根号xy+y)/(x根号x-y根号y).