# Question #2db17

Feb 11, 2017

The values of $k$ are $= \pm 2$

#### Explanation:

Let's calculate the discriminant

$\Delta = {b}^{2} - 4 a c$

$= 16 - 4 \cdot k \cdot k$

$= 16 - 4 {k}^{2}$

If the roots are equal, then

$\Delta = 0$

$16 - 4 {k}^{2} = 0$

${k}^{2} = 4$

$k = \pm 2$