Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 10 - Exponents and Radicals - 10.8 The Complex Numbers - 10.8 Exercise Set: 33

Answer

$-12-5i$

Work Step by Step

Removing the grouping symbols and then adding the real parts and the imaginary parts, the given expression, $ (-5-i)-(7+4i) ,$ simplifies to \begin{array}{l}\require{cancel} -5-i-7-4i \\\\= (-5-7)+(-i-4i) \\\\= -12-5i .\end{array}
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