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: 8

Answer

a. 2, b. -10, c. -4

Work Step by Step

We are given the function $f(x)=x^{2}-5x-4$. In order to find the specified values, we can plug the values into the function and solve. a. $f(-1)= (-1)^{2}-5(-1)-4=(-1\times-1)-5\times-1-4=(1)-(-5)-4=1+5-4=2$ b. $f(2)= (2)^{2}-5(2)-4=(2\times2)-5\times2-4=(4)-(10)-4=4-10-4=-10$ c. $f(0)= (0)^{2}-5(0)-4=(0\times0)-5\times0-4=(0)-(0)-4=0-0-4=-4$
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