The quadratic formula for a quadratic equation in the form of \(ax^2 + bx + c = 0\) is \(x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\). The first solution is \(x = \frac ...

solving quadratic equations using the quadratic formula - Higher, solving a quadratic equation by completing the square - Higher and graphs of quadratic functions. If you struggled with the quiz ...

Everyone learns (and some readers maybe still remember) the quadratic formula ... using this method. Normalizing A to 1 is also an old trick and is sometimes called a reduced quadratic equation.