Question

For f(x) = 2x + 1 and g(x)=x^2 - 7, find (f - g)(x)

A. x^2 + 2x - 8
B. -x^2 + 2x + 8
C. 2x^2 - 15
D. -2x + 2x - 6

Answer 1

Answer: B

Explanation:

`(f-g)(x)=f(x)-g(x)=(2x+1)-(x^(2)-7)=2x+1-x^(2)+7=\boxed{-x^(2)+2x+8}`