# 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)?

−abcdef

They can't be multiplied

abcdef

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

ab − c

−abc

abc

3. What is the product of −(−b)(−c)?

bc

−bc

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.

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

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