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2 December, 12:26

Find f (g (x)) if f (x) = 3x + 1 and g (x) = x2 - 1.

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  1. 2 December, 14:12
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    Substitute g (x) into f (x) every place you see an x

    3 (g (x)) + 1

    3 (x^2-1) + 1

    distribute

    3x^2 - 3 + 1

    combine like terms

    3x^2 - 2

    Answer: 3x^2 - 2
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