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4 October, 07:22

If f (x) = x^2 and g (x) = 4f (x) - 1, then what is the value of g (-3) ? I don't get it ...

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  1. 4 October, 08:29
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    The answer is 35.

    For g (-3), we substitute - 3 for x:

    g (-3) = 4f (-3) - 1

    Since f (x) = x², this means that

    f (-3) = (-3) ² = 9; we can put this in place of f (-3):

    g (-3) = 4 (9) - 1

    g (-3) = 36 - 1 = 35
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