Quadratic Equations

On this session we will learn how to solve quadratic equation by 

1. Factorising

2. Completing the square

3. Formula

1. Quadratic Equations - Solution by factorising

All quadratic equations have the form

If a quadratic equation factorises then we can solve it by using a factorising method as shown in this video.

Summary Exercise

2. Quadratic Equations - Completing the square

In this tutorial you are shown how to solve a quadratic equation by using the method of completing the square. This is often used when a quadratic equation does not factorise.

3. Quadratic Equations - ABC Formula 

Some quadratic equations cannot be solved by factorising and so an alternative method is the quadratic formula. It is based on a method called completing the square

The first tutorial shows you when to use it, clues that are given in a question and common mistakes that are often made.

In the second video its show you how to derive it.

and Here the video how to derive the formula