Answer
$-5\sqrt 5$
Work Step by Step
$-\sqrt 125=-(\sqrt (25\times5))=-(\sqrt 25\times\sqrt 5)=-(5\sqrt 5)=-5\sqrt 5$
We know that $\sqrt 25=5$, because $5^{2}=25$.
Intermediate Algebra (12th Edition)
by Lial, Margaret L.; Hornsby, John; McGinnis, Terry
Published by
Pearson
ISBN 10:
0321969359
ISBN 13:
978-0-32196-935-4
Chapter 7 - Review Exercises - Page 498: 57
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