Answer
$-28a^7$
Work Step by Step
By removing the parentheses and adding the exponents of the like terms, we get
$$
(7a^2)(-4a^4)(a)=7(-4)a^7=-28a^7
.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 5 - Test - Page 232: 8
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