Answer
13
Work Step by Step
We get:
$|a+bi|=\sqrt a^2+b^2$
Substitute $a=-5, b=12$:
$|-5+12i|=\sqrt (-5)^2+(12)^2=13$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 4 Quadratic Functions and Factoring - Standardized Test Practice - Gridded Answer - Page 327: 14
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