# What is the vertex form of #y=4x-x^2#?

##### 1 Answer

Jan 3, 2016

To find the vertex of a parabola we must calculate

#### Explanation:

A parabola only has one vertex, which may be a maximum or a minimum. To find it, we must derive it and equal to zero:

This is the same that calculating

Eventually, let us calculate the value of

So the vertex of the parabola is at