Answer
$4-i$
Work Step by Step
Use $i^3=-i$ to obtain:
$4+i^{3}\\
=4+(-i)\\
=4-i$
Hence, the solution in the standard form is $4-i$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Appendix A - Review - A.7 Complex Numbers; Quadratic Equations in the Complex Number System - A.7 Assess Your Understanding - Page A61: 40
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