Find functions f and g so that h(x)=(f(g))(x)

Question

hx= 1/x^2-8

Answer 1

hx= 1/(x^2-8 ) maybe??

f(g(x)) ?
say g(x) = x^2-8
say f(whatever) = 1/whatever
then
f(g(x))= 1/g(x) = 1/(x^2-8)