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26 February, 12:50

If f (x) = 3x + 5 and g (x) = - 2x2 - 5x + 3, find (f + g) (x).

A. (f + g) (x) = - 2x + 8

B. (f + g) (x) = - 4x + 8

C. (f + g) (x) = - 2x2 - 2x + 8

D. (f + g) (x) = - 2x2 + 8x + 8

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  1. 26 February, 13:14
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    (f + g) (x) is equal to f (x) + g (x).

    So (f + g) (x) = (3x + 5) + (-2x^2 - 5x + 3) = - 2x^2 - 2x + 8

    which is choice C.
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