Answer
$47i$
Work Step by Step
Since $i=\sqrt{-1}$ here: $5\sqrt{-16}+3\sqrt{-81}=5\sqrt{16}\sqrt{-1}+3\sqrt{81}\sqrt{-1}=5(4)i+3(9)i=47i$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
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 - Page 570: 105
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
