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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 4 - No. 12)

What are the factors of x² + 7x + 12?
(x + 6)(x + 1)
(x + 3)(x + 4)
(x + 2)(x + 6)
(x + 1)(x + 12)

Explicació

The numbers that multiply to 12 and add to 7 are 3 and 4.

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