Answer
$-30x^{12}$
Work Step by Step
$(x)(5x^{4})(-6x^{7})=5\times-6\times x^{1+4+7}=-30\times x^{12}=-30x^{12}$
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 - Section 5.5 - Multiplying Polynomials - Exercise Set - Page 378: 12
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