Factorize (x^2 - 9).

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• A (x - 4)(x + 6)
• B 98x²
• C (x - 3)(x + 3)
• D (4x - 2)(3x-4)

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

apply the difference of squares algebraic identity: (a^2 - b^2 = (a - b)(a + b)

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