Answer:
I Believe your answer is 12x2+16x+9
if not, be more specific for what you need, I will be glad to answer
Explanation:
One of the following functions is made of a composition of f(x) and g(x)
12x2 + 16x + 2
21x3 + 14x + 2
12x2 + 16x + 9
21x2 + 14x + 2
If we sum f(x) with g(x) we have the answer 12x2+16x+9
Perfoming another operation like f(x)*g(x), f(x)-g(x), f(g(x)), doesnt give anything like the below functions.