# How do you find the axis of symmetry, graph and find the maximum or minimum value of the function #y=x^2+4x-1#?

##### 2 Answers

Explanation is given below.

#### Explanation:

To solve such problems, go for completing the square. If not then find vertex using

The

The coefficient of

Let me show it by completion of square.

I would first add

Next step is to take the coefficient of

Subtract

Vertex

Axis of symmetry

Minimum at

Plot the graph using *Graph* tool given above.

#### Explanation:

graph{y=x^2+4x-1 [-20, 20, -10, 10]}

From the Graph:

Vertex is located at

Axis of symmetry

Minimum at