## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$(3a)b$
$\bf{\text{Solution Outline:}}$ Regroup the product of the terms in the given expression, $3(ab) .$ $\bf{\text{Solution Details:}}$ The Associative Law of Multiplication states that $a(bc)$ is the same as the $(ab)c.$ Hence, the given expression is equivalent to \begin{array}{l}\require{cancel} (3a)b .\end{array}