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The graph of f(x) = x2 − 6x − 16 is shown. Which of the following describes all solutions for f(x)?

(−2, 0), (0, −16), (3, −25), (8, 0)
(x, x2 − 6x − 16) for all real numbers
(−2, 0), (8, 0)
(x, y) for all real numbers