(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x+根号下y)+2xy/(x根号下y+y根号下x)=______.

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(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x+根号下y)+2xy/(x根号下y+y根号下x)=______.

(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x+根号下y)+2xy/(x根号下y+y根号下x)=______.
(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x+根号下y)+2xy/(x根号下y+y根号下x)=______.

(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x+根号下y)+2xy/(x根号下y+y根号下x)=______.
结果为根号下x+根号下y
解2xy/(x根号下y+y根号下x)分母提公因式根号下xy 然后前后两式分母都含根号下x+根号下y
合并后约分得根号下x+根号下y