Question

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

A.5x-3
B.3-x
C.5x-1
D.x-3
which and why?

Answer 1

3x - 2 - (2x + 1)

Distribute -1 to both terms in the parentheses.

3x - 2 - 2x - 1

Combine like terms.

x - 3

Thus, D is your answer.