(x*根号下x + x*根号下y ) / (xy-y^2) — (x + 根号下xy + y) /(x*根号下x — y
(x*根号下x + x*根号下y ) / (xy-y^2) — (x + 根号下xy + y) /(x*根号下x — y
(x+y)/(根号下x+根号下y)+2xy/(x根号下y+y根号下x)=______.
已知X+Y=—3,XY=2求根号下x/y+根号下y/x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)]
(根号下y-x)平方+根号下x平方-2xy+y平方 化简
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
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
[x-y]根号下 1/y-x +根号下 x的平方-2xy+y的平方 化简
已知正实数x y满足x-根号xy-2y=0求 x+3根号xy+2y/2x-2根号下xy-y
已知y=根号下(x-4)+根号下(4-x)+3,求代数式(x-y+4xy/x-y)(x+y-4xy/x+y)?