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Mini-Quiz: Proof that Product of Two Negative Numbers is Positive

by Ron Kurtus (26 September 2013)

Take this Mini-Quiz to check your understanding of the lesson material.

1. What is the product of (−abc)(−def)?


They can't be multiplied


2. What is the product of (−a)(−b)(−c)?

ab − c



3. What is the product of −(−b)(−c)?



b − c

If you got all three correct, you are on your way to becoming a Champion in Algebra. If you had problems, you had better look over the material again.

Do your best

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Why is a negative times a negative a positive? - Ask Dr. Math - FAQ

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