### Home > CC4 > Chapter 2 > Lesson 2.1.1 > Problem 2-7

2-7.

Benjamin is taking Algebra 1 and is stuck on the problem shown below. Examine his work so far and help him by showing and explaining the remaining steps. Homework Help ✎

Original problem: Simplify (3

*a*^{−2}*b*)^{3}.He knows that (3

*a*^{−2}*b*)^{3}= (3*a*^{−2}*b*)(3*a*^{−2}*b*)(3*a*^{−2}*b*). Now what?

Use the Associative and Commutative Properties to rewrite the expression.

3 · 3 · 3 ·

*a*^{-2}· a^{-2}· a^{-2}· b · b · bSimplify.