Answer
$$ 60\sqrt{15}$$
Work Step by Step
We multiply the radicands together and the coefficients as well to get,
$$15 \sqrt {240} = 15 \sqrt {4^2*15} = 60\sqrt{15}$$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 4 Quadratic Functions and Factoring - 4.5 Solve Quadratic Equations by Finding Square Roots - 4.5 Exercises - Skill Practice - Page 269: 8
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