计算 (根号下x+xy-根号下xy)(根号下y+y的平方+y)(x>0 y>0) 快啊.
计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0);
计算:根号下X(X+Y)除根号下X+Y分之XY方
若X>0,y>0,且x-根号下xy-2y=0,求(2x-根号下xy)/y+2根号下xy的值
若x>0,y>0,且x-根号下xy-2y=0,求【2x-根号下xy】÷【y+2根号下xy】的值
若实数x,y满足根号下(x+2)加根号下(y-根号下3)的平方=0,则xy的值是()
(根号下y-x)平方+根号下x平方-2xy+y平方 化简
(x+y)/(根号下x+根号下y)+2xy/(x根号下y+y根号下x)=______.
[x-y]根号下 1/y-x +根号下 x的平方-2xy+y的平方 化简
已知x、y满足根号下4x-5y+根号下x-y-1=0,则根号下xy-根号下x/y
根号下(x^2-2xy+y^2/xy)化简 x>y>0
若x的平方+Y+2X-4倍根号Y+5=0求根号下-XY的值
化简:[(x×根号x+x×根号y)/(xy-y²)]-[(x+根号下xy+y)/(x×根号x-y×根号y)]