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9 August, 18:49

A function f (x) = - 8x^2. What is f (-3) ?

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Answers (2)
  1. 9 August, 18:52
    0
    F (x) = - 8x²

    f (-3) = - 8 * (-3) ²

    f (-3) = - 8 * 9

    f (-3) = - 72
  2. 9 August, 19:09
    0
    f (x) = - 8x²

    To find the value of f (-3), put - 3 in place of 'x' in the definition of the function.

    f (-3) = - 8 (-3) ²

    f (-3) = - 8 (9) = - 72
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