Final answer:
The polynomial function has roots at x = 3 with a multiplicity of 4 and x = -6 with a multiplicity of 2.
Step-by-step explanation:
The polynomial function f(x) = (x - 3)^4(x + 6)^2 can be factored into (x - 3)(x - 3)(x - 3)(x - 3)(x + 6)(x + 6).
By looking at the factors, we can see that the function has roots at x = 3 with a multiplicity of 4 and x = -6 with a multiplicity of 2.
Therefore, the correct statement is option D - 3 with a multiplicity 4 and -6 with a multiplicity 2.