Which of the following is NOT a way to solve quadratic equations?

Choosing numerical methods is not classified as a distinct method for solving quadratic equations in the same sense as factoring, completing the square, or using the quadratic formula. While numerical methods involve approximating solutions, they do not provide an algebraic representation of the solutions like the other methods do.

Factoring breaks down the quadratic equation into simpler binomial expressions, allowing for direct solutions. Completing the square transforms the equation into a perfect square trinomial, making it easier to solve. The quadratic formula provides a generalized solution for any quadratic equation. Each of these methods yields exact solutions and holds an established place in algebra, while numerical methods are more about estimation and do not guarantee exact answers in the same structured way. Thus, the distinction lies in the nature of the solution process, where the other options provide definitive solutions based on algebraic manipulation.