Answer
$x^2+9$
Work Step by Step
use complex arithmetic rule
$(a+bi)(a-bi)=a^2+b^2$
$a=x$
$b=3$
$x^2+3^2$
$x^2+9$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 8 - Section 8.1 - Complex Numbers - 8.1 Problem Set - Page 426: 83
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