Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 1 - Foundations for Algebra - 1-4 Properties of Real Numbers - Practice and Problem-Solving Exercises - Page 27: 35



Work Step by Step

On the left side, $-a\times b$ is the same as $(-1)\times a\times b$. On the right side, $a\times(-b)$ is the same as $a\times(-1)\times b$. We see that the order of numbers that are multiplied is changing, so we can say that the expressions are equal due to the commutative property of multiplication.
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