Question

If f(x) = -5^x -4 and g(x) = -3x - 2 find (f-g)(x).

A. (f-g)(x) = -5^x + 3x -2
B. (f-g)(x) =5^x -3x+2
C. (f-g)(x) = -2x-2
D. (f-g)(x) = -5^x-3x-6

Answer 1

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Answer:

A. (f-g)(x) = -5^x +3x -2

Explanation:

The only terms that can be combined are the constants.

(f -g)(x) = f(x) -g(x)

(f -g)(x) = (-5^x -4) -(-3x -2) = -5^x -4 +3x +2

(f -g)(x) = -5x^4 +3x -2 . . . . . matches A