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11 July, 01:16

If f (x) = 2x2 - 30, find f (4).

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  1. 11 July, 01:20
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    Just replace x = 4

    2x^2 - 30

    =2 * (4) ^2 - 30

    = 2 * 16 - 30

    = 32 - 30

    = 2

    Answer is 2
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