Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 7 - Section 7.7 - Complex Numbers - Exercise Set: 32


$12 + 7i\sqrt{5}$

Work Step by Step

Regroup then simplify by combining like terms to obtain $=(4+8) + (i\sqrt{5}+6i\sqrt{5}) \\= 12 + (i+6i)\sqrt{5} \\=12 + 7i\sqrt{5}$
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