Changes

These are solved for using the [[quadratic formula]], which will not only solve for [[real number|real]] roots, but result in the [[imaginary number|imaginary]] roots if the parabola does not actually cross the y axis (this is when <math>4ac</math> is greater than <math>b^2</math>).

These are solved for using the [[quadratic formula]], which will not only solve for [[real number|real]] roots, but result in the [[imaginary number|imaginary]] roots if the parabola does not actually cross the y axis (this is when <math>4ac</math> is greater than <math>b^2</math>).

Quadratic equations are very important in calculating the motion of bodies under constant [[acceleration]], i.e., [[gravity]].

Quadratic equations are very important in calculating the motion of bodies under constant [[acceleration]], i.e., [[gravity]] (when close to the earth's surface).

The [[derivative]] of a quadratic equation is a simple [[linear function]]:

The [[derivative]] of a quadratic equation is a simple [[linear function]]: