College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 5 - Summary, Review, and Test - Cumulative Review Exercises (Chapters 1-5) - Page 587: 15

Answer

$x_1=2$ $x_2=-3$ $x_3=\dfrac{1}{2}$

Work Step by Step

We are given the equation: $(x-2)(2x^2+5x-3)=0$ Factor the polynomial: $(x-2)(2x^2+6x-x-3)=0$ $(x-2)[2x(x+3)-(x+3)]=0$ $(x-2)(x+3)(2x-1)=0$ $x-2=0\Rightarrow x_1=2$ $x+3=0\Rightarrow x_2=-3$ $2x-1=0\Rightarrow x_3=\dfrac{1}{2}$
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