College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 1, Equations and Graphs - Section 1.5 - Complex Numbers - 1.5 Exercises: 61

Answer

$\pm 7i$

Work Step by Step

$x^{2}+49=0$ $x^{2}=-49$ $x=\pm\sqrt{-49}=\pm 7i$
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