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26 March, 03:41

Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.

a2 - 2a - 224 = 0

8, - 28

16, - 14

-16, 14

-8, 28

+3
Answers (2)
  1. 26 March, 03:51
    0
    For this case we have the following equation:

    a2 - 2a - 224 = 0

    Applying the resolver we have:

    A = ( - b + / - root (b ^ 2 - 4 * a * c)) / (2 * a)

    Substituting values we have:

    A = ( - ( - 2) + / - root (( - 2) ^ 2 - 4 * 1 * ( - 224))) / (2 * (1))

    Rewriting:

    A = (2 + / - root (4 + 896)) / (2)

    A = (2 + / - root (900)) / (2)

    A = (2 + / - 30) / (2)

    The roots are:

    A1 = (2 + 30) / (2)

    A2 = (2 - 30) / (2)

    Rewriting:

    A1 = 16

    A2 = - 14

    Answer:

    16, - 14
  2. 26 March, 04:04
    0
    The answer is Answer:

    16, - 14
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