# How can you use the quadratic formula to find the vertex of a parabola?

##### 1 Answer

Nov 3, 2015

#### Answer:

Average the roots that come from the quadratic formula to see that the

#### Explanation:

The quadratic formula says the roots of the quadratic equation

Whether these roots are real or complex numbers, when you average the two, the square roots cancel and you get

This clearly gives the vertex when there are