Question
F(x) = x^2- 4x , g(x) = 2 – 3x it wants to know the (f-g) (-5)
Answer
28
- Calculate (f-g)(-5) by substituting -5 for x in f(x) and g(x).
- Substitute x=-5 into each function.
- f(-5) = (-5)^2 - 4(-5) = 25 + 20 = 45
- g(-5) = 2 -3(-5) = 2 + 15 = 17
- (f-g)(-5) = f(-5) - g(-5) = 45 - 17 = 28