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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 6 - No. 39)

Which of the following is the correct factorization of 3x + 9?
3(x + 3)
3x(1 + 3)
9(x + 1)
x(3 + 9)

Explanation

Greatest common factor is 3, 3(x+3)

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