Answer
$\mathrm{k}=\pm 4$
Work Step by Step
For a repeated real solution, the discriminant must be zero.
$\mathrm{b}^{2}-4\mathrm{a}\mathrm{c}=0$
$(-\mathrm{k})^{2}-4(1)(4)=0$
$\mathrm{k}^{2}=16$
$\mathrm{k}=\pm 4$
College Algebra (10th Edition)
by Sullivan, Michael
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
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