SOLUTION: Please help me solve this inequality? (x+13)(x-13)(x+7)>0

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Question 376269: Please help me solve this inequality?
(x+13)(x-13)(x+7)>0
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
(x+13)(x-13)(x+7)>0
x+13>0
x>-13 ans.
x-13>0
x>13 ans.
x+7>0
x>-7 ans.
Proof:
Let x=-12.9
(-12.9+13)(-12.9-13)(-12.9+7)>0
.1*-25.9*-5.9>0
15.281>0
Let x=-6.9
(-6.9+13)(-6.9-13)(-6.9+7)>0
-89.7*89.7*.1>0
808.609>0