# Finding the focus points of a hyperbola

1. Nov 10, 2015

### astrololo

1. The problem statement, all variables and given/known data
So I have the following hyperbola

x^2/4 - y^2/4 = -1

I need to find the focus points of this hyperbola. What is some analytical way to do this ?

Thank yoU!

2. Relevant equations
I don't know...

3. The attempt at a solution

I need some analytical way to be able to do this. Can somebody give me a hint ?

2. Nov 10, 2015

### SammyS

Staff Emeritus
Use a double \$ on this site for LaTeX

$$\frac{x^{'2}}{4}-\frac{y^{'2}}{4}=-1$$

3. Nov 10, 2015

### astrololo

Oh thank you for telling me !

4. Nov 10, 2015

### Staff: Mentor

In future posts, you need to show more of an effort than you did here. If you don't, you will get infraction points.
Or equivalently, $\frac{y^2}{4} - \frac{x^2}{4} = 1$.
This is a form that is simpler to work with.
See https://en.wikipedia.org/wiki/Hyperbola.