College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 1 - Section 1.2 - Quadratic Equations - 1.2 Assess Your Understanding - Page 103: 120

Answer

$\mathrm{k}=\pm 4$

Work Step by Step

For a repeated real solution, the discriminant must be zero. $\mathrm{b}^{2}-4\mathrm{a}\mathrm{c}=0$ $(-\mathrm{k})^{2}-4(1)(4)=0$ $\mathrm{k}^{2}=16$ $\mathrm{k}=\pm 4$
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