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: 20



Work Step by Step

By multiplying each term of the polynomial by the factor $7w^2y$, and then adding the products, we have $$ 7w^2y(w^2 - 4y^2 + 6w^2y^3)=7w^2y(w^2 )+7w^2y(- 4y^2) +7w^2y( 6w^2y^3)\\ =7w^4y-28w^2y^3+42w^4y^4. $$
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