Find the equation of the hyperbola whose foci are
and the eccentricity is
.
Given: Foci are
, and the eccentricity is 
Need to find: The equation of the hyperbola.
Let, the equation of the hyperbola be: 
The eccentricity, e = 
And also given, foci are ![]()

That means, ae = ![]()
⇒ 
⇒
[As e =
]
⇒ ![]()
We know that, 
Therefore,
⇒ 
⇒
[Squaring both sides]
⇒ 
⇒
[As a =
]
So, the equation of the hyperbola is,
⇒
[Answer]