Given that:

`f(x)= 3x^2`

g(x)= l 2x-1 l

We need to find the value of fog(-2).

==> fog(-2)= f(g(-2))

==> g(-2)= l 2*-2 -1 l = l -5l = 54

==> fog(-2)= f(g(-2)) = f(5) = 3*`5^2` = 3*25 = 75

==> fog(-2) = 75

Given that:

`f(x)= 3x^2`

g(x)= l 2x-1 l

We need to find the value of fog(-2).

==> fog(-2)= f(g(-2))

==> g(-2)= l 2*-2 -1 l = l -5l = 54

==> fog(-2)= f(g(-2)) = f(5) = 3*`5^2` = 3*25 = 75

==> fog(-2) = 75