Question 1040502
{{{f(x)= (3x^2 - 3)/(x^2 - 4) =  (3*(x-1)(x+1))/((x-2)(x+2))}}}

==> Domain = ({{{-infinity}}}, -2)u(-2,2)u(2,{{{infinity}}}).

Horizontal asymptote: 

{{{lim( x->infinity, (3x^2 - 3)/(x^2 - 4)) = 3 = lim(x->-infinity,(3x^2 - 3)/(x^2 - 4))}}} ==> horizontal asymptote is y = 3.

Vertical asymptotes: x = 2 and x = -2.