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4 December, 05:32

Factor Completely: x^2 - 169

A) (x - 4) (x + 42)

B) (x - 13) (x + 13)

C) (x - 13) (x - 13)

D) (x + 16) (x - 10)

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Answers (2)
  1. 4 December, 07:35
    0
    The answer is B

    Step-by-step explanation:

    As 169 is a perfect square of 13 and the formula is, a²-b² = (a+b) (a-b). Or you can try to expand it out:

    (x+13) (x-13) = x² - 13x + 13x - 169

    = x² - 169

    (Hope you understand)
  2. 4 December, 08:43
    0
    It would be B. (x-13) (x+13). 13 times 13 is 169 and multiplying a negative and a positive will still give a negative value
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