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15 November, 15:19

Find the value of f (-4) if f (x) = x2 + 7.

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  1. 15 November, 18:42
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    Just plug in - 4 everywhere you see an x:

    f (x) = 2x + 7

    f (-4) = 2 (-4) + 7

    f (-4) = - 8 + 7

    f (-4) = - 1
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