Given that
f
(
x
)
=
x
2
−
4
x
−
12
f(x)=x
2
−4x−12 and
g
(
x
)
=
x
−
6
g(x)=x−6, find
(
f
⋅
g
)
(
x
)
(f⋅g)(x) and express the result in standard form.