Mathematics

Problem

The expression

\dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

gives a) the axis of symmetry of the parabola

y = ax^2 + bx + c

b) the discriminant of the quadratic expression

ax^2 + bx + c

c) the roots of the equation

ax^2 + bx + c = 0

d) the maximum or minimum value of the quadratic expression

ax^2 + bx + c