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21 September, 08:48

F (x) = - x² + x + 13

Find f (9)

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Answers (2)
  1. 21 September, 09:10
    0
    103.

    Step-by-step explanation:

    If you plug in 9 for the value of x in the equation, 103 is your answer.
  2. 21 September, 11:13
    0
    f (9) = - 59

    Step-by-step explanation:

    to find f (9), just substitue 9 for every x value in the equation

    for example:

    f (x) = - x² + x + 13

    substitute in 9 for the x values

    f (9) = - 9² + 9 + 13

    solve and add like terms

    f (9) = - 59
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