Answer
$15x^4-20x^3$
Work Step by Step
We multiply the monomial by each term of the polynomial as follows
$$
5x^3(3x - 4)=15x^4-20x^3
.$$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Appendix A - Review - A.3 Polynomials - A.3 Assess Your Understanding - Page A31: 44
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