Given the function f(x) = −5x2 − x + 20, find f(3).

Substitute 3 for x in the function: f(3) = −5(3²) − 3 + 20. Since 3² = 9, this becomes −45 − 3 + 20 = −28, so the correct choice is −28.

AI-written and checked against the verified answer.