Factorise: x² + 5x + 6

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• A (x+5)(x+3)
• B (x-2)(x-3)
• C (x+2)(x+3)
• D (x-2)(x-6)

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Answer: C. (x+2)(x+3)

Split the middle term: x² + 2x + 3x + 6 = x(x + 2) + 3(x + 2) = (x + 2)(x + 3).

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