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16 October, 10:27

I don' need sleep i need answers

x2+10x = - 9

x2-14x+40=-5

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Answers (1)
  1. 16 October, 10:30
    0
    x = - 1, - 9.

    x = 5, 9.

    Step-by-step explanation:

    x^2 + 10x = - 9

    x^2 + 10x + 9 = 0

    (x + 1) (x + 9) = 0

    x = - 1, - 9.

    x^2 - 14x + 40 = - 5

    x^2 - 14x + 45 = 0

    (x - 5) (x - 9) = 0

    x = 5, 9.
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