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12 February, 05:22

If f (x) = 8 - 10x and g (x) = 5x + 4, what is the value of (fg) (-2) ?

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  1. A
    12 February, 08:16
    0
    F (x) = 8 - 10xg (x) = 5x + 4

    (fg) (x) = (8 - 10x) (5x + 4)

    (fg) (x) = 40x + 32 - 50x^2 - 40x

    (fg) (x) = 32 - 50x^2

    (fg) (-2) = 32 - 50 (-2) ^2

    (fg) (-2) = 32 - 200

    (fg) (-2) = - 168
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