Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 4 - Section 4.3 - Polynomial Functions, Graphs, and Composition - 4.3 Exercises - Page 294: 10


a. -3, b. 9, c. -5

Work Step by Step

We are given the function $f(x)=3x^{2}+x-5$. In order to find the specified values, we can plug the values into the function and solve. a. $f(-1)= 3(-1)^{2}+(-1)-5=3\times(-1\times-1)+(-1)-5=(3\times1)-1-5=(3)-1-5=3-1-5=-3$ b. $f(2)= 3(2)^{2}+(2)-5=3\times(2\times2)+(2)-5=(3\times4)+2-5=(12)+2-5=12+2-5=9$ c. $f(0)= 3(0)^{2}+(0)-5=3\times(0\times0)+(0)-5=(3\times0)+0-5=(0)+0-5=0+0-5=-5$
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