The hyperbola equation is 
Convert the equation into standard form of hyperbola.
\Seperate
and
in the above equation.

Add and subtract the square of half of the
and
variable.





.
The standard form of vertical hyeprbola
.
Eccentricity :
.
Determine the eccentricity.
\Compare the above equation with standard form of vertical hyperbola.
\
and
.
For hyperbola :
.

.
The eccentricity is
.
Substitute
and
.


The eccentricity is
.
Eccentricity :
.