Question

For f(x) = 2x+1 and g(x) = x2 - 7, find (f+9)(x).

Answer 1

`\large\boxed{(f+g)(x)=x^2+2x-6}`

Explanation:

`(f+g)(x)+f(x)+g(x)\\\\f(x)=2x+1,\ g(x)=x^2-7\\\\(f+g)(x)=(2x+1)+(x^2-7)=2x+1+x^2-7=x^2+2x-6`