Which expression represents h(x)?

ANSWER
(f.g)(x)
EXPLANATION
From the table we can observe the following patterns:
f(-6)=12
g(-6)=-6
h(-6)=-72=12×-6
f(0)=3
g(0)=0
h(0)=0=3×0
f(6)=-6
g(6)=6
h(6)=-36=-6×6
Hence the h(x) is obtained by multiplying f(x) by g(x).
h(x)=(f.g)(x)