Appendix A - Review - A.7 Complex Numbers; Quadratic Equations in the Complex Number System - A.7 Assess Your Understanding - Page A61: 80

One real, repeated solution.

The given quadratic equation has $a=4,b=12$ and $c=9$. The discriminant is $b^2-4ac$ $=(12)^2-4(4)(9)$ $=144-144$ $=0$ The discriminant is zero so the equation has one real, repeated solution.