Laetus, Marcia, and one athlete – assassin of Roman emperor Commodus Planner: Laetus Assassins: Marcia and an unnamed athlete who strangled the emperor in his bath when Marcia's poison worked too slowly.
... (In this case, the parabola does not intersect the x-axis at all.)
Note that when computing roots numerically, the usual form of the quadratic formula is not ideal. ...