For this case we have that the following function complies with the given conditions:

To prove it, let's find the roots of the polynomial:

By doing common factor 3 we have:

Factoring the second degree polynomial we have:

Then, the solutions are:
Solution 1:

Solution 2:

Answer:
A second degree polynomial function f (x) that has a lead coefficient of 3 and roots 4 and 1 is:
