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 ...

After all, people have been solving that equation ... rewrite the zero as (x-S)(x-R) and the rest follows very logically. The only real problem is not many quadratic equations have A=1.