Question

If f(x) = 3x + 10x and g(x) = 2x – 4, find (f – g)(x).

Answer 1

(13-(-2))(x) = 15x
you can't find the value of x so instead, you can simplify the expression

Answer 2

(f-g)(x) = 11x+4

Explanation:

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

This means we have

3x+10x-(2x-4)

This gives us

3x+10x-2x--4

3x+10x-2x+4

13x-2x+4

11x+4