Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 1 - Section 1.4 - Adding Real Numbers - Vocabulary and Readiness Check - Page 36: 3



Work Step by Step

If $a$ is a number, then $-(-a)=a$. We know this, because $-(-a)=-1\times-a=a$, since the product of two negative numbers is positive.
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