Answer
$b=\pm \sqrt{c^2-a^2}$
Work Step by Step
Subtract $a^2$ to both sides to obtain:
$b^2=c^2-a^2$
Take the square root of both sides to obtain:
$b=\pm \sqrt{c^2-a^2}$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter P, Prerequisites - Section P.8 - Solving Basic Equations - P.8 Exercises - Page 60: 96
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