Answer
$4+i$
Work Step by Step
We know that if a quadratic equation with real coefficients has a complex solution, then its conjugate will also be a solution. Hence, $4+i$ will also be a solution.
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 1 - Section 1.3 - Complex Numbers; Quadratic Equations in the Complex Number System - 1.3 Assess Your Understanding - Page 112: 82
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