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30 January, 18:06

Evaluate the polynomial f (x) = 2x^3-4x^2+2x-8. At x=-2

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Answers (2)
  1. 30 January, 18:43
    0
    -44

    Step-by-step explanation:

    If f (x) = 2x^3-4x^2+2x-8 where x=-2

    You replace all of the "x's" for - 2s. Like so ...

    2 (-2) ^3-4 (-2) ^2+2 (-2) - 8

    it would = - 44.
  2. 30 January, 19:52
    0
    f ( - 2) = - 44

    Step-by-step explanation:

    Substitute x = - 2 into f (x) and evaluate, that is

    f ( - 2) = 2 ( - 2) ³ - 4 ( - 2) ² + 2 ( - 2) - 8

    = 2 ( - 8) - 4 (4) - 4 - 8

    = - 16 - 16 - 4 - 8

    = - 44
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