Which of the following is a factor of x squared plus 7x plus 12?
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Correct!
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Correct answer to question 16 (Mathematics Knowledge): (x + 4)
Method
Look for two numbers that multiply to 12 and add to 7. The pairs multiplying to 12 are 1 and 12, 2 and 6, and 3 and 4, and only 3 and 4 add to 7. So the factors are (x + 3)(x + 4).
Updated: November 2026
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