Question

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

Answer 1

B

Explanation:

Solution

If you call f(x) = y1

and call g(x) = y2

Then what you are asked to find is y1 - y2

So y1 - y2 = 3x - 1 - (x + 2) Remove the brackets.

y1 - y2 = 3x - 1 - x - 2 Collect like terms

y1 - y2 = 2x - 3

Answer

(f - g)x = 2x - 3 or B