Find the root(s) of f (x) = (x + 5)3(x - 9)2(x + 1).

A root occurs when one of the factors equals zero. From (x + 5)³ = 0, x = −5 with multiplicity 3; from (x − 9)² = 0, x = 9 with multiplicity 2; and from (x + 1) = 0, x = −1 with multiplicity 1. These match choices A, D, and F.

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