Question 72707
<pre>
find the domain of function  

                3
    g(x)=  __________
            x2-2x-15

                 3
        =  ______________ 
           (x - 5)(x + 3)

   Remember that the denominator must not equal to 0

Restrictions: 
       (x - 5) (x + 3) = 0
        x - 5 = 0      and   x + 3 = 0
            x = 5      and       x = -3

Domain: All real numbers except 5 and -3

Look at the graph

{{{graph (400, 200, -5, 8, -3, 3, 3/(x^2-2x-15))}}}