SOLUTION: Find the domain of f(x) = (x-3)/(x^2-3x-4)

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Question 1199942: Find the domain of f(x) = (x-3)/(x^2-3x-4)
Answer by ikleyn(53765) About Me  (Show Source):
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The denominator is  x^2-3x-4.


Factor it to identify its roots  x^2-3x-4 = (x-4)*(x+1).


Now you see that the roots are 4 and -1.


Hence, the domain is the set of all real numbers except of -1 and 4 
(because division by zero is PROHIBITED).


ANSWER.  The domain is the set of all real numbers except of -1 and 4.

Solved.