Respuesta :

[tex]y = \frac{x - 5}{x^{2} - 6x + 5}[/tex]
[tex]y = \frac{x - 5}{(x - 1)(x - 5)}[/tex]
[tex]y = \frac{1}{x - 1}[/tex]

x - 1 = 0
  + 1  + 1
     x = 1