haji789 haji789 17-03-2021 Mathematics contestada If f(x) = 2x - 6 and g(x) = 3x + 9, find (f - g)(x). O A. (f- g)(x) = x + 15 B. (f- g)(x) = 5x + 3 C. (f- g)(x) = -x + 3 D. (f- g)(x) = = -X- 15