Answer
$z=\pm2i\sqrt 2$
Work Step by Step
$2z^2+16=0$
$2z^2=-16$
$z^2=-8$
$\sqrt z^2=\pm\sqrt-8$
$z=\pm2i\sqrt2$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 11 - Section 11.1 - Solving Quadratic Equations by Completing the Square - Exercise Set - Page 763: 19
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