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Given the function, find it's domain.

`f(x) = (3 x+17)/(x^2 -2 x -15)`

The domain is all real numbers except `x =` 

If there is more than one answer, write it as a list, using commas to separate your answers.

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   x  x  √  n√  |   | (   ) π ∞ DNE
   x  √  (   ) π ∞ DNE
( ) ( ] [ ) [ ] —∞ ∞ ∪ DNE
< > ≤ ≥ or All Real Numbers DNE
log logn ln n√  | | e 
sin cos tan arcsin arccos arctan ⟨ ⟩
[more..]