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18 August, 11:00

What two numbers multiply to get - 12 but add to get - 1?

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Answers (2)
  1. 18 August, 13:24
    0
    The answer is - 4 and 3
  2. 18 August, 14:38
    0
    Xy = - 12

    x + y = - 1

    x = - 12/y

    - 12/y + y = - 1

    - 12 + y^2 = - y

    y^2 + y - 12 = 0

    (y - 3) (y + 4) = 0

    y = 3, y = - 4

    3x = - 12

    x = - 4

    y = 3
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