Answer
The quadratic equation has one real solution.
Work Step by Step
$Discriminant\gt0$: two real solutions.
$Discriminant=0$: one real solution.
$Discriminant\lt0$: no real solutions.
$9x^2+12x+4=0~~$ ($a=9,b=12,c=4$)
$Discriminant=b^2-4ac=12^2-4(9)(4)=144-144=0$
