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





 

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