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4 October, 12:21

If f (x) = 2x2 + 1, what is f (x) when x = 3?

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Answers (2)
  1. 4 October, 12:35
    0
    2 (3) ^2 + 1

    2 (3*3) + 1

    2 (9) + 1

    18+1

    19.
  2. 4 October, 12:44
    0
    The answer is 19

    Just replace x = 3

    f (3) = 2x2 + 1

    f (3) = 2 (3^2) + 1

    f (3) = 2 (9) + 1

    f (3) = 18 + 1

    f (3) = 19
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