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

$6a^2\sqrt{b}$
Using the properties of radicals, the given expression, $\sqrt{36a^4b} ,$ simplifies to \begin{array}{l}\require{cancel} \sqrt{36a^4\cdot b} \\\\= \sqrt{(6a^2)^2\cdot b} \\\\= 6a^2\sqrt{b} \end{array} * Note that it is assumed that no radicands were formed by raising negative numbers to even powers.