SOLUTION: please help the question is * for what value(s) of the variable is the rational expression undefined? 2x+ 9 divide by (x-5)(x+9)

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Question 119526: please help
the question is
* for what value(s) of the variable is the rational expression undefined?
2x+ 9
divide by
(x-5)(x+9)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
%282x%2B9%29%2F%28%28x-5%29%28x%2B9%29%29
The expression is undefined whenever the denominator equals zero because division by zero is undefined.
%28x-5%29%28x%2B9%29=0
if
%28x-5%29=0
x=5
or if
%28x%2B9%29=0
x=-9