SOLUTION: How do you determine whether a pair of functions are inverse if one of the functions contains an exponent like this one? f(x)=x^2-9 and g(x)=x+3

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Question 929877: How do you determine whether a pair of functions are inverse if one of the functions contains an exponent like this one? f(x)=x^2-9 and g(x)=x+3
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Functions f and g are inverses if f%28g%29=g%28f%29=x
f%28g%29=%28x%2B3%29%5E2-9=%28x%5E2%2B6x%2B9%29-9=x%5E2%2B6x <-- Not equal to x.
g%28f%29=%28x%5E2-9%29-3=x%5E2-12 <--- Also not equal to x.
They are not inverses.