根号xy除以x-y分之根号x+根号y 即：根号xy/(根号x+根号y)/(x-y)_数学解答

根号xy除以x-y分之根号x+根号y 即：根号xy/(根号x+根号y)/(x-y)

人气：127 ℃　时间：2020-04-20 08:01:42

解答

√(xy)÷[(√x+√y)/(x-y)]
=√(xy)×[(x-y))/(√x+√y)]
=√(xy)×[(√x+√y)(√x-√y)/(√x+√y)]
=√(xy)×(√x-√y)
=x√y-y√x