SOLUTION: Can someone please show me how to do this: (s+3)(s-3)

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Question 36502: Can someone please show me how to do this:
(s+3)(s-3)
Answer by benni1013(206) About Me  (Show Source):
You can put this solution on YOUR website!
Use the foil method:
(s+3)(s-3)
First:s*s=s^2
Outer:3*s=3s
Inner:-3*s=-3s
Last:3*-3=-9
s^2+3s-3s-9==>Simplify==>s^2-9