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5-9.

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  
He knows that . Now what?

Use the Associative and Commutative Properties to rewrite the expression.

3 · 3 · 3 · a−2 · a−2· a−2· b · b · b

Simplify.