Answer
$x=0\pm7i$
Work Step by Step
$x^{2}+49=0$
Take the $49$ to the right side of the equation:
$x^{2}=-49$
Take the square root of both sides:
$\sqrt{x^{2}}=\sqrt{-49}$
$x=\pm7i$
The solution is:
$x=0\pm7i$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 1 - Section 1.6 - Complex Numbers - 1.6 Exercises - Page 64: 61
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