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6 April, 17:47

For f (x) = 2x + 1 and g (x) = x2 - 7, find (f - g) (x).

A. - x^2 + 2x - 6

B. - x^2 + 2x + 8

C. x^2 - 2x - 8

D. 2x^2 - 15

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  1. 6 April, 18:09
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    F (x) = 2x + 1; g (x) = x² - 7

    (f - g) (x) = (2x + 1) - (x² - 7) = 2x + 1 - x² + 7 = - x² + 2x + 8

    Answer: B. - x² + 2x + 8
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