根号2x-根号8x³+2根号xy²(y>0)
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
①{(x+y)/(根号x+根号y)}+{2xy/根号xy(根号x+根号y)}
化简:(根号xy)-(根号x/y)+(根号y/x)+(根号x/y+y/x+2)(x、y>0)
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)
跟号打不出来,所以用汉字,大家费点劲哈 ((根号x/根号x+根号y)-(根号y/根号y-根号x)-(2根号xy/x-y)
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))
已知当x=8,y=18,求(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)
计算:【(根号2y-x)-(根号3x/y)】根号6xy-【(1/3(根号75y²)-(根号18x²)
已知:x>0,y>0,x-2y=根号xy.求(x+(根号xy)+y)/(x-(根号xy)-y)
设x>0,y>0,且根号x(根号x+根号y)=3根号y(根号x+5根号y),求代数式2x+根号xy+2y\x-根号xy-
{(x-y)/(根号x+根号y)}-(x+y-2倍根号xy)/(根号x-根号y)=?