Q. Which of the following is the correct factorization of x^2 - 9?
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A.
(x - 3)(x + 3)
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B.
(x - 3)(x - 3)
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C.
(x + 3)(x + 3)
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D.
(x - 9)(x + 1)
Solution
Step 1: Recognize it as a difference of squares: a^2 - b^2 = (a - b)(a + b). Step 2: Here, a = x, b = 3. So, (x - 3)(x + 3).
Correct Answer:
A
— (x - 3)(x + 3)
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