Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1-6 - Cumulative Review - Page 440: 11



Work Step by Step

We solve the given expression by using the rules of Algebra to isolate the variable on one side of the equation. Doing this, we find: $$ \:2x^2+7x-4=0 \\ x\left(2x-1\right)+4\left(2x-1\right)=0 \\ \left(2x-1\right)\left(x+4\right)=0 \\ x=\frac{1}{2},\:x=-4$$
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