Answer
6
Work Step by Step
Simplifying the expression using the rules of radicals, we obtain:
$$ \sqrt{\left(9+3\sqrt{5}\right)\left(9-3\sqrt{5}\right)}\\ \sqrt{36} \\ 6$$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 10 - Exponents and Radicals - 10.5 Expressions Containing Several Radical Terms - 10.5 Exercise Set - Page 662: 134
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