Question

Simplificati: $\frac{x-5}{ x^{2}- 25 }$

Answer 1

x patrat - 25 = (x + 5)(x-5) 
simplifici cu x-5 si iti ramane 1 supra x+5

Answer 2

 $\frac{x-5}{x^2-25}=\frac{x\not{-}5^{^1}}{(x\not{-}5_{_{1}})(x+5)}=\frac{1}{x+5}$