![]() So, how does this tell us where the vertex is? Well, the vertex will be at the point where y is a minimum or maximum. Note: Completing the square and the quadratic formula are not the same method.įor more info on these methods, see the lessons at this link. This method is called completing the square because you create a perfect square trinomial, which factors into a binomial-squared.Ĥ) Quadratic formula. ![]() Specifically, it can be used for any quadratics in the form of "x^2 = a number" or "(ax+b)^2 = a number"ģ) Completing the square. This also only works for some quadratics. But, it is usually easier than other methods when it works.Ģ) Square root method. ![]() This does not work for all quadratics because not all are factorable. The 4 methods for solving are:ġ) Factoring. You are mixing up the name of the methods with the type of equations. Quadratic equations can be solved using 4 different methods. As to why they are called quadratics, see this link: Quadratic equations are any equation that can be written in the form: Ax^2 + Bx + C = 0, where A is not = 0.
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