Question

If f(x)=3x-1 and g(x)=x+2, find (f-g)(x)
A. 4x+1
B. 3-2x
C. 2x-3
D. 2x-1

Answer 1

(f-g) (x) = f(x) - g(x) =3x-1-(x+2)=3x-1-x-2=2x-3
Answer is C

Answer 2

C

Explanation:

(f - g)(x) = f(x) - g(x) , then

f(x) - g(x)

= 3x - 1 - (x + 2)

= 3x - 1 - x - 2 ← collect like terms

= 2x - 3 → C