Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - Test - Page 181: 3

Answer

$-\frac{1}{2},\frac{7}{3}$

Work Step by Step

Step 1. Find the factor of coefficients, we have $6=(2)(3)$ and $-7=(1)(-7)$ Step 2. Test the sum of products using the above factors to get $2(-7)+(3)(1)=-11$ which is the middle coefficient. Step 3. Factor the equation as $(2x+1)(3x-7)=0$, thus the solutions are $x=-\frac{1}{2}$ and $x=\frac{7}{3}$
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