【√x/(√x+√y)-√y/(√y-√x)-2√yx/x-y】/(1/√x-1/√y)*(√x+√y)
=【√x/(√x+√y)+√y/(√x-√y)-2√yx/x-y】/(1/√x-1/√y)*(√x+√y),
=(√x(√y-x)+√y(√x+√y)-2√xy)/(√x+√y)(√x-√y)÷ 1/(√x-y)*(√x+√y)
=√xy-x+√xy-y-2√xy
=-x-y
=-√2+1-√2-1
=-√2
如果本题有什么不明白可以追问,
【√x/(√x+√y)-√y/(√y-√x)-2√yx/x-y】/(1/√x-1/√y)*(√x+√y)
=【√x/(√x+√y)+√y/(√x-√y)-2√yx/x-y】/(1/√x-1/√y)*(√x+√y),
=(√x(√y-x)+√y(√x+√y)-2√xy)/(√x+√y)(√x-√y)÷ 1/(√x-y)*(√x+√y)
=√xy-x+√xy-y-2√xy
=-x-y
=-√2+1-√2-1
=-√2
如果本题有什么不明白可以追问,