For a quadratic equation ax2+bx+c=0ax^2+bx+c=0ax2+bx+c=0, the discriminant is given by the expression [...]\text{[...]}[...].
For a quadratic equation ax2+bx+c=0ax^2+bx+c=0ax2+bx+c=0, the discriminant is given by the expression b2−4ac\boxed{b^2-4ac}b2−4ac.