Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 10 - Quadratic Equations - 10.4 - Solving Quadratic Equations - Which Method? - Concept Quiz 10.4: 7

Answer

A

Work Step by Step

The equation $x^{2}-4x-12=0$ can easily be solved by factoring as shown below: $x^{2}-4x-12=0$ $x^{2}+2x-6x-12=0$ $x(x+2)-6(x+2)=0$ $(x+2)(x-6)=0$ $x+2=0$ and $x-6=0$ $x=-2$ and $x=6$
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