Answer
$25$
Work Step by Step
$(4+3\iota)$$(4-3\iota)$
Multiply using the FOIL method:
$=(4\times4)+(4\times-3i)+(3i\times4)+(3i \times-3i)
\\=16-12i+12i-9i^2
\\=16+9+0i
\\=25$
Algebra 2 Common Core
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133186024
ISBN 13:
978-0-13318-602-4
Chapter 4 - Quadratic Functions and Equations - Cumulative Standards Review - Multiple Choice - Page 276: 22
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