Answer
-11
Work Step by Step
We know that $\sqrt 121=11$, because $11^{2}=11\times11=121$.
Therefore, we know that $-\sqrt 121=-(11)=-11$.
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 - Section 7.1 - Radical Expressions and Graphs - 7.1 Exercises - Page 440: 14
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