SOLUTION: Given x= x+7 _______ x^(2)-9 determine the domain. A. All real numbers except �3 and 3 B. All real numbers except �7 and 3

Question 364436: Given x=
x+7
_______
x^(2)-9
determine the domain.
A. All real numbers except �3 and 3
B. All real numbers except �7 and 3
C. All real numbers except �7, �3, and 3
D. All real numbers except 0

Found 2 solutions by Fombitz, Theo:
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
I think you mean
The domain is all numbers except those that make the denominator equal zero since division by zero is undefined.
A) All except and .

Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
Expression is:

The denominator will be 0 when x = 3 or x = -3.

The domain should be all real numbers except x = 3 and x = -3.

A graph of your equation looks like this:

The numerator in the rational expression can be 0, but the denominator can't.

Your selection would be A.

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