Question

Find (f-g)(x) if f(x)=2x^2+1 and g(x)=x^2-7

A. x^2+8
B. x^2-6
C. 3x^2-6
D. 3x^2+8

Answer 1

C. 3x^2-6

Explanation:

I just took the test.

(Apex)

Answer 2

A

Explanation:

To find (f-g)(x), take gx) and subtract it from f(x).

`f(x) = 2x^2+1`

and

`g(x) = x^2-7`

so

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