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