Question

I am confused on how to do this can I get some help please?

Answer 1

According to the definition of addition of functions

$\begin{gathered} (f+g)(x)=f(x)+g(x) \\ \end{gathered}$

Then, in our case,

$\begin{gathered} (f+g)(x)=(3x^3+7x-26)+(x+2)=3x^3+8x-24 \\ \Rightarrow(f+g)(x)=3x^3+8x-24 \end{gathered}$

The answer is 3x^3+8x-24