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8 February, 18:44

3) Factor x2 - 8x - 9.

Check

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Answers (2)
  1. 8 February, 19:02
    0
    (x - 9) (x + 1)

    Step-by-step explanation:

    Given

    x² - 8x - 9

    Consider the factors of the constant term ( - 9) which sum to give the coefficient of the x - term ( - 8)

    The factors are - 9 and + 1, since

    - 9 * 1 = - 9 and - 9 + 1 = - 8, thus

    x² - 8x - 9 = (x - 9) (x + 1)
  2. 8 February, 19:11
    0
    (x-9) (x+1)

    Step-by-step explanation:

    factor using the box method or quadratic formula.
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