Answer
45
Work Step by Step
Multiply the absolute values. Since both factors have the same sign, the product is positive.
$(-5)(-9)=|-5|\times |-9|=5\times9=45$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 2 - Section 2.3 - Multiplication and Division of Signed Numbers - Exercises - Page 114: 2
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