Answer
-18
Work Step by Step
Replace $a$ with 9 and $b$ with -2 in $ab$:
$ab=9\times(-2)=-18$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 2 - Section 2.4 - Multiplying and Dividing Integers - Exercise Set - Page 129: 85
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