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## Homework Statement

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!

## Homework Equations

I don't know...

## The Attempt at a Solution

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