Answer
$-40x^{3n}+30x^{2n}-2x^{n+1}$
Work Step by Step
$-10x^n(4x^{2n}-3x^n+\frac{1}{5}x)=\\=-10x^n\cdot4x^{2n}-10x^n\cdot(-3x^n)-10x^n\cdot\frac{1}{5}x\\=-40x^{3n}+30x^{2n}-2x^{n+1}$
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: 22
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