(x-y)/(x根号y-y根号x)求 分母有理化

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(x-y)/(x根号y-y根号x)求 分母有理化

(x-y)/(x根号y-y根号x)求 分母有理化
(x-y)/(x根号y-y根号x)求 分母有理化

(x-y)/(x根号y-y根号x)求 分母有理化
原式=(x-y)(x√y+y√x)/(x√y+y√x)(x√y-y√x)
=(x-y)(x√y+y√x)/(x²y-xy²)
=(x-y)(x√y+y√x)/[xy(x-y)]
=(x√y+y√x)/(xy)


(x-y)/(x√y-y√x)
=(x-y)(x√y+y√x)/[(x√y+y√x)(x√y-y√x)]
=(x-y)(x√y+y√x)/[(x√y)²-(y√x)²]
=(x-y)(x√y+y√x)/(x²y-xy²)
=(x-y)(x√y+y√x)/xy(x-y)
=(x√y+y√x)/xy

（(x^2)根号y+xy根号x-xy根号y-（y^2）根号x）/（(x^2)y-(y^2)x）

分子分母同时乘以 x根号y+y根号x

化简:(根号X/Y)+(根号y/x) 化简(x-y)/(根号x+根号y) 求使 根号x+根号y 代数式求值.已知x=2,y=根号3,求 (根号x-根号y)/(根号x+根号y)+(根号x+根号y)/(根号x-根号y)已知x=2,y=根号3,求 (根号x-根号y)/(根号x+根号y)+(根号x+根号y)/(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)的值 已知y=根号x-8+根号8-x+18,求根号x-根号y分之x+y-x根号y+y根号x x根号y-y根号x/x根号y+y根号x-y根号x+x根号y/y根号x-x根号y=急求,救命啊 已知,x,y为正整数,且根号x+根号y=根号2012,求x+y x,y是整数,根号x+根号y等于根号2004,求x+y的值 根号X+根号Y=根号1998,X.Y是正整数.求X+Y=? 根号X(根号X+根号Y)=3根号Y(根号X+5根号Y),求(X+根号XY-Y)分之(2X+根号XY+3Y)的值根号X(根号X+根号Y)=3根号Y(根号X+5根号Y),求(X+根号XY-Y)分之(2X+根号XY+3Y)的值 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 x+y/根号X-根号Y-2XY/X乘根号Y-Y乘根号X 根号x-根号y分之x+y-x根号y-y根号x分之2xy 求导数 y=(x*根号x根号x根号x)/3次根号x^2 已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y 已知4x2+9y-4x-6y+2=0 求根号y/根号x+根号y - 根号y/根号x-根号y快.