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

$\sqrt{35ab}$
Using the Product Rule of radicals which is given by $\sqrt[m]{x}\cdot\sqrt[m]{y}=\sqrt[m]{xy},$ the given expression is equivalent to \begin{array}{l}\require{cancel} \sqrt{5a}\sqrt{7b} \\\\= \sqrt{5a(7b)} \\\\= \sqrt{35ab} .\end{array}