Answer
$10x^8-20x^5+45x^3$
Work Step by Step
$5x^3(2x^5-4x^2+9)=\\5x^3\cdot2x^5-5x^3\cdot4x^2+5x^3\cdot9\\=10x^8-20x^5+45x^3$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 5 - Section 5.2 - Multiplication of Polynomials - Exercise Set - Page 337: 13
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