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16 September, 09:33

If f (x) = 25-x2 and g (x) = x+5, what is (fg) (x) ? Write your answer in simplest form. When f (x) = 25-x2 and g (x) = x+5, (fg) (x) =

+5
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  1. 16 September, 09:40
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    (fg) (x) means to multiply the functions f (x) * g (x).

    (25 - x^2) (x + 5)

    25 * x = 25x

    25 * 5 = 125

    - x^2 * x = - x^3

    - x^2 * 5 = - 5x^2

    Putting it all back together:

    - x^3 - 5x^2 + 25x + 125
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