SOLUTION: what is the domain of Log3 (x^2-9)?

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Question 545704: what is the domain of Log3 (x^2-9)?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
what is the domain of Log3 (x^2-9)
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You can only take the log of a number>0, (regardless of base)
x^2+9>0
(x+3)(x-3)>0
number line
<...+...-3....-.....3.....+...>
Domain: (-∞,-3) U (3, ∞)