Question

Find the functions f (x) and g (a) such that f (g(x)) = (x+6)² - 4.
a) f(x)=x-4.g(x) = (x + 6)² b) g(x) = (x+6)² - 4. f (x) = x c) f(x) = (x+6)² - 4. g(x) = x d) g(x)=x²-4. f(x) = x + 6 e) g(x)=x-4, f(x) = (x + 6)² f) f(x)=x²-4; g(x)=x+6