Fil d'Ariane CultureSciences-Chimie Testing different features Testing different features When $a \ne 0$, there are two solutions to \(ax^2 + bx + c = 0\) and they are $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$ Partager ce contenu Chimie des origines du vivant En savoir plus