Home > A2C > Chapter 11 > Lesson 11.1.1 > Problem11-11

11-11.

For what values of $n$ does the equation $2x^{2} + nx + 9 = 0$ have exactly one root?

Make the discriminant equal to zero.

$n^{2} − 4\left(2\right)\left(9\right) = 0$