# What is the domain and range of # f(x) = x^2-4x-7#?

##### 1 Answer

Jan 19, 2016

The domain is the set of all real numbers.

The range is

#### Explanation:

The domain of a function is the set of possible

In this example there is no restriction on the set of real values that

To find the range, we need to find the vertex of the parabola.

The vertex is

The range is therefore