Answer
$-15x^{16}$
Work Step by Step
$(5x^7)(-3x^9)$
$=-15x^{7+9}$
$=-15x^{16}$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 5 - Review - Page 412: 40
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