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22 September, 17:46

F (x) = 4x+7, g (x) = 3x^2

find (fg) (x)

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  1. 22 September, 17:53
    0
    We want f (g (x)).

    This means to plug the value of g (x) into every x you see in f (x) and simplify.

    f (3x^2) = 4 (3x^2) + 7

    f (3x^2) = 12x^2 + 7

    So, f (g (x)) = 12x^2 + 7.

    Did you follow?
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