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4 September, 02:10

Choose the correct zeros for the following quadratic function.

f (x) = x^2 + 5x - 14

A. {1, 3}

B. {4, - 3}

C. {2, - 7}

D. {2, - 1}

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Answers (1)
  1. 4 September, 05:32
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    Replace f (x) with 0. Then solve for x

    f (x) = x^2 + 5x - 14

    0 = x^2 + 5x - 14

    x^2 + 5x - 14 = 0

    (x+7) (x-2) = 0 ... factor (think of two numbers that multiply to - 14 and add to 5)

    x+7 = 0 or x-2 = 0

    x = - 7 or x = 2

    The two zeros, roots, or x intercepts are x = - 7 or x = 2

    Answer: Choice C) {2, - 7}
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