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

$3-y$
Using the properties of radicals, the given expression, $\sqrt{9-6y+y^2} ,$ simplifies to \begin{array}{l} \sqrt{(3-y)^2} \\\\= 3-y .\end{array} Note that it is assumed that no radicand was formed by raising negative quantities to even powers. Thus, absolute value bars are not necessary.