You know the quadratic equation solution by now. Or, at least I hope you do.

But, to really understand it, look at how we can derive it from scratch. Check out quadratic-equation-derived.

To factor a quadratic equation, you may have leaned the guess and check method. It works, but when the leading term coeficient isn’t 1, it may be time consuming. For these situations, we have the A-C-factor-method.