Answer
$-12x^{3n}+20x^{2n}-2x^{n+1}$
Work Step by Step
$-4x^n(3x^{2n}-5x^n+\frac{1}{2}x)=\\=-4x^n\cdot3x^{2n}-4x^n\cdot(-5x^n)-4x^n\cdot\frac{1}{2}x\\=-12x^{3n}+20x^{2n}-2x^{n+1}$
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: 21
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