Question

For f(x) = 2x + 1 and g(x) = x2 -7 find (f - g)(x)

Answer 1

(f - g)(x) = f(x) - g(x) = (2x + 1) - (x^2 - 7) = -x2 + 2x + 8 = (x + 2)(4 - x)

Answer 2

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

Explanation:

We have to find the next expression:
`(f-g)(x)=f(x)-g(x)` as we know the
`f(x)` and
`g(x)` then:

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