化简(x-y)/(根号x+根号y)

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化简(x-y)/(根号x+根号y)化简(x-y)/(根号x+根号y)化简(x-y)/(根号x+根号y)(x-y)/(根号x+根号y)=((根号x)²-(根号y)²)/(根号x+根号

化简(x-y)/(根号x+根号y)
化简(x-y)/(根号x+根号y)

化简(x-y)/(根号x+根号y)
(x-y)/(根号x+根号y)
=((根号x)²-(根号y)²)/(根号x+根号y)
=(根号x-根号y)(根号x+根号y)(根号x+根号y)
=根号x-根号y

答案 根号x-根号y
x-y=(根号x+根号y)(根号x-根号y) 平方差公式

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