Algebra: A Combined Approach (4th Edition)

by Martin-Gay, Elayn

Published by Pearson

ISBN 10: 0321726391

ISBN 13: 978-0-32172-639-1

Chapter 6 - Section 6.6 - Solving Quadratic Equations by Factoring - Exercise Set - Page 459: 76

Answer

The error was that the sign of the constant was kept in solving the equations.

Work Step by Step

$x-4=0$ $x-4+4=0+4$ $x=4$ $x+2=0$ $x+2-2=0-2$ $x=-2$ $x=-2, 4$

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