The polynomial function we can actually see that has a leading coefficient of 1, roots –2 and 7 with multiplicity 1, and root 5 with multiplicity 2 is: f(x) = (x – 7)(x – 5)(x – 5)(x + 2).
Polynomial function actually refers to the function that has only non-negative integer powers. Also, it can also be a function with positive integer exponents only.
Thus, f(x) = (x – 7)(x – 5)(x – 5)(x + 2) is the correct polynomial function.
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