Look at the National 4 factorising section before continuing. When a question asks you to 'solve' a quadratic equation, this means that you are to find the roots of the quadratic. In other words ...

2 we have: (0) × (5) = 0. If \({x ... these would be incredibly difficult to factorise so the quadratic formula is used. Key fact When solving quadratics in exams it is common for the ...