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13 September, 19:08

If f (x) = x+4 and g (x) = x^2-1, what is g (f (x)) ?

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  1. 13 September, 19:12
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    g (f (x)) means plug in f (x) for every "x" in g (x).

    g (f (x)) = (x+4) ^2-1=x^2+8x+16-1=x^2+8x+15

    answer: x^2+8x+15
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