Answer
$-6\sqrt{11}$
Work Step by Step
Factor out $\sqrt{11}$ to obtain:
$=\sqrt{11}(7-13)
\\=\sqrt{11}(-6)
\\=-6\sqrt{11}$
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 5 - Number Theory and the Real Number System - Chapter Summary, Review, and Test - Review Exercises - Page 335: 72
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