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: 117

Answer

$15x^{2}+12x-9$

Work Step by Step

We are given that $P(x)=3x+3$ and $R(x)=5x^{2}-7$. $3[R(x)]+4[P(x)]=3(5x^{2}-7)+4(3x+3)=(15x^{2}-21)+(12x+12)$ Combine like terms. $15x^{2}+12x+(-21+12)=15x^{2}+12x-9$
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