# How do you find the vertex for #y=x^2-4#?

##### 1 Answer

I know this question is one year old....

But for the others who may want to know how to do this, here is the solution:

To find vertexes, there are two methods.

**Method one: Using the formula**

You can easily find the

Therefore, for vertex

Then, you calculate the

Therefore, the vertex is

**Method two: Completing the square**

This method is more formal and some tests and exams require you to use this method.

This method will find the vertex form

However, the equation

Therefore, the coordinates of the vertex is

Hope that makes sense!