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5 February, 22:52

If ƒ (x) = 15x + 7 and g (x) = x2 - 5x, find (ƒ + g) (x).

A. (ƒ + g) (x) = x2 + 10x + 7

B. (ƒ + g) (x) = 15x2 - 75x + 7

C. (ƒ + g) (x) = 15x + g + 7

D. (ƒ + g) (x) = 15x3 - 68x2 - 35x

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  1. 5 February, 23:22
    0
    x² + 10 x + 7 → A

    (f + g) (x) = f (x) + g (x) = 15x + 7 + x² - 5x = x² + 10x + 7
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