Answer
One thing we have to recall is that we only want the positive value for finding the hypotenuse.
Work Step by Step
Another thing we have to recall is that $a$ and $b$ are the legs of the triangle and $c$ is the hypotenuse of the triangle.
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 7 - Section 7.6 - Radical Equations and Problem Solving - Vocabulary, Readiness & Video Check - Page 453: 6
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