Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 2 - Review Exercises - Page 430: 47

Answer

zeros of $ f(x)$ are $2,\dfrac{1}{2}, -3 $

Work Step by Step

When a polynomial $ f(x)$ is divided by $(x-a)$, then the remainder is $ r=f(a)$ We have the dividend $ f(x)= 2x^3+x^2-13x+6$ and it is divided by $(x-2)$. So, $ f(x)=(x-2) (2x^2+5x-3)$ or, $ f(x)=(x-2)(2x-1)(x+3)$ We need to solve for $ x $, so set each factor equal to $0$. $ x=2,\dfrac{1}{2}, -3 $ Thus, the zeros of $ f(x)$ are $2,\dfrac{1}{2}, -3 $
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