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30 January, 13:10

What two numbers add up to - 19 and have a product of 70

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Answers (2)
  1. 30 January, 15:39
    0
    -5+-14 would equal - 19 and multiply to 70
  2. 30 January, 16:52
    0
    X + y = - 19

    xy = 70

    x + y = - 19

    x - x + y = - x - 19

    y = - x - 19

    xy = 70

    x (-x - 19) = 70

    x (-x) + x (-19) = 70

    -x² - 19x = 70

    -x² - 19x - 70 = 0

    -1 (x²) - 1 (19x) - 1 (70) = 0

    -1 (x² + 19x + 70) = 0

    -1 - 1

    x² + 19x + 70 = 0

    x² + 14x + 5x + 70 = 0

    x (x) + x (14) + 5 (x) + 5 (14) = 0

    x (x + 14) + 5 (x + 14) = 0

    (x + 5) (x + 14) = 0

    x + 5 = 0 or x + 14 = 0

    - 5 - 5 - 14 - 14

    x = - 5 or x = - 14

    x + y = - 19

    -5 + y = - 19

    + 5 + 5

    y = - 14

    (x, y) = (-5, - 14)

    or

    x + y = - 19

    -14 + y = - 19

    + 14 + 14

    y = - 5

    (x, y) = (-14, - 5)

    The two numbers that add up to - 19 and multiply to 70 are - 14 and - 5.
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