SOLUTION: Let s and t be real numbers. When is s*t>0? show work, if any, please.

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Question 1116310: Let s and t be real numbers.
When is s*t>0?
show work, if any, please.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Let s and t be real numbers.
When is s*t>0?
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|s| > 0
and |t| > 0
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Or s <> 0 and t <> 0, and
s and t have the same sign.