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21 December, 04:26

Factor this quadratic expression:

a2 - 2a - 15

+4
Answers (2)
  1. 21 December, 04:42
    0
    A^2-2a-15

    1. Ask: Which two numbers add up to - 2 and multiply to - 15?

    -5 and 3

    2. Rewrite the expression using the above

    (a-5) (a+3)

    Have a nice day : D
  2. 21 December, 04:52
    0
    A² - 2a - 15

    = a² - 5a + 3a - 15

    = a (a-5) + 3 (a-5)

    = (a-5) (a+3)
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