Here's the question you clicked on:
ParthKohli
What is the equation of a hyperbola?
isnt it \[\huge \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1?\]
Close. Hyperbolas are centered on a point, so that needs to be in there as well: http://www.purplemath.com/modules/hyperbola.htm (scroll down to the middle)
You know, everywhere I go, a and b are switched to different places...