Oie, Tudo Bom?!
[tex] \frac{x + 6}{x {}^{2} - 36 } = \frac{x + 6}{x {}^{2} - 6 {}^{2} } = \frac{x + 6}{(x - 6) \: . \: (x + 6)} = \boxed { \frac{1}{x - 6} }[/tex]
Att. Makaveli1996
