The difference of two squares can be factorised into brackets using the method above for factorising quadratics. Factorise \(x^2 - 4\). Quadratics can be factorised into the form \((x + a)(x + b)\).

Sometimes we have to factorise quadratics such as 4\({x^2 ... If you already have a method that works and are comfortable with it, then continue to use that method. The following may be ...