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28 February, 02:31

Use the quadratic formula to find the solutions for

-x^2 - 5x + 12 = 0

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Answers (2)
  1. 28 February, 02:45
    0
    -6.772001873

    Step-by-step explanation:

    state that quadratic formula and substitute the terms into it to solve for the answer
  2. 28 February, 02:58
    0
    x1=-6.772

    x2=1.772

    Step-by-step explanation:

    -x²-5x+12=0

    For the general quadratic form: ax²+bx+c=0, the roots are found with formula:

    x1,2 = (-b + - sqrt (delta)) / (2a)

    where delta=b²-4ac.

    In our case: a=-1, b=-5, c=12

    delta=b²-4ac = (-5) ²-4 (-1) * 12=25+48=73

    Sqrt (delta) = sqrt (73) = 8.544

    x1,2 = (5 + - 8.544) / (-2)

    x1 = - (5+8.544) / 2=-13.544/2=-6.772

    x2 = - (5-8.544) / 2=3.544/2=1.772
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