differentiate the following :
[tex] \frac{ \sqrt{x + 2} \: – \sqrt{x – 2} }{ \sqrt{x + 2} \: + \: \sqrt{x – 2} } [

[tex]\frac{ \sqrt{x + 2} \: – \sqtr{x – 2} }{ \sqrt{x + 2} \: + \: \sqrt{x – 2} } [/tex]

Let square this

[tex]\frac{x + 2} \: – {x – 2} }{x + 2} \: + \: {x – 2} } [/tex]

(x+2-x+2)/(x+2+x-2)

(4)/(2x)

2/x