SOLUTION: If the product of two numbers is positive , then the two numbers must both be positive. What is the counterexample for this ?

SOLUTION: If the product of two numbers is positive , then the two numbers must both be positive. What is the counterexample for this ?

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Question 496188: If the product of two numbers is positive , then the two numbers must both be positive. What is the counterexample for this ?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
-4 times -5 is 20; counterexample.
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