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Mathematics, 14.06.2020 01:57 gary4570

Which of the functions below have exactly two distinct real zeros?

1. f(x) = -x2 + 14x – 45

II. f(x) = 4x2 + 4

III. f(x) = 2x2 + 12x + 18

IV. f(x) = 3x2 - 4x - 4

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Which of the functions below have exactly two distinct real zeros?

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