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 ...

Many former algebra students have painful memories of struggling to memorize the quadratic formula. A new way to derive it, overlooked for 4,000 years, is so simple it eliminates the need.

Learn and revise how to solve quadratic equations by factorising, completing the square and using the quadratic formula with Bitesize GCSE Maths Edexcel.