求计算:根号x+根号y-(根号xy+x)乘根号1/x
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根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
计算 (xy-y2分之x根号x+x根号y)-(x根号x-y根号y分之x+根号xy+y)
计算:【(根号2y-x)-(根号3x/y)】根号6xy-【(1/3(根号75y²)-(根号18x²)
已知x平方+y平方-2y+1=0,求(根号x+根号y+3)/((根号xy+y)(3根号x+根号y))
化简:2乘根号xy^3/(-1/2乘根号x^3y^2)
已知x,y为正数,且根号x(根号x+根号y)=3根号y(根号x+5根号y),求:(2x+根号xy+3y)/(x+根号xy
①{(x+y)/(根号x+根号y)}+{2xy/根号xy(根号x+根号y)}
已知根号x+根号y=根号5,根号xy=根号15-根号3,求x+y的值
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
已知y=(根号x-4)+(根号4-x)+2,求 (根号xy^3)
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)