Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 5 - Section 5.3 - Polynomials and Polynomial Functions - Exercise Set - Page 281: 99

Answer

$-3x-7.9$

Work Step by Step

We are given $(12x-1.7)-(15x+6.2)=12x-1.7-15x+6.2$. However, this is an incorrect use of the distributive property to distributive the negative sign to the second term. $(12x-1.7)-1\times(15x+6.2)=12x-1.7-15x-6.2=-3x-7.9$
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