Answer
$5+10i$
Work Step by Step
Using $i^2=-1$, the expression $
-5i(-2+i)
$ simplifies to
\begin{array}{l}
10i-5i^2
\\=
10i-5(-1)
\\=
5+10i
.\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 7 - Section 7.7 - Complex Numbers - Exercise Set - Page 463: 54
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.
