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14 February, 10:12

Given the definitions of f (x) and g (x) below, find the value of g (f (-1)).

f (x) = - 4x - 7

g (x) = x² + 7x - 2

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  1. 14 February, 10:17
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    (x) = (x-7) (x-4)

    g (x) = x (2) + 7x - 2

    Now find a common denominator. (x+10) (x-4) is a good one.

    x-16 / (x+10) (x-4) + x-4 / (x+10) (x-4)

    2x-20 / (x+10) (x-4)
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