The first attempts to find a more general formula for solving quadratic equations may have been made by Greek philosophers Pythagoras (c. 500 BC) and Euclid (c. 300 BC), who both used a geometric ...

For a quadratic equation of the form y = k (x a) 2 + b, the following diagram shows the main properties: If k > 0, the vertex is a minimum turning point If k < 0, the vertex is a maximum turning point ...

A quadratic equation contains terms up to x 2. There are many ways to solve quadratics. All quadratic equations can be written in the form a x 2 + b x + c = 0 where a, b and c are numbers (a ...