A quadratic equation is a type of polynomial equation of degree 2, which means the highest power of the variable is two. The standard form of a quadratic equation is:

Where:

- , and are constants (coefficients).
- If then the equation becomes linear, not quadratic

The solutions to the quadratic equation, often referred to as the “roots” or “zeroes”, can be found using various methods such as factoring, completing the square, or using the quadratic formula. The shape a quadratic equation forms is a parabola.