Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 5 - Section 5.5 - Multiplication of Polynomials - Exercise - Page 225: 11

Answer

$$-12x^3+21x^2+6x. $$

Work Step by Step

By multiplying each term of the polynomial by the monomial, and then adding the products, we have $$-3x(4x^2-7x-2)=-3x(4x^2)-3x(-7x)-3x(-2).\\ =-12x^3+21x^2+6x. $$
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