Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.6 - Complex Numbers - 1.6 Exercises: 61

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: $x=0\pm7i$
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