Question

If f(x)=3x-2 and g(x)=2x+1,find (f-g)(x)

A. x - 3
B. 5x - 3
C. 3 - x
D. 5x - 1

Answer 1

A

`f(x) = 3x - 2 \\ g(x) = 2x + 1 \\ (f - g)x = f(x) - g(x) \\ = (3x - 2) - (2x + 1) \\ = (3 - 2)x + ( - 2 - 1) \\ = x - 3`

Answer 2

A

Explanation:

(f - g)(x)

= f(x) - g(x)

= 3x - 2 - (2x + 1)

= 3x - 2 - 2x - 1 ← collect like terms

= x - 3 → A