Answer
58
Work Step by Step
$(3-7i)(3+7i)=3^{2}-(7i)^{2}=9-7^{2}*-1=9+49=58$
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 1, Equations and Graphs - Section 1.5 - Complex Numbers - 1.5 Exercises - Page 131: 34
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