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For the inequation x^2–7x + 12 > 0, which one of the following is correct ?

3 < x < 4
–∞ < x < 3 only
4 < x < ∞ only
–∞ < x < 3 or 4 < x < ∞

Correct Answer: –∞ < x < 3 or 4 < x < ∞

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