When you do (f+g)(x), all you have to do is take both functions and add them to each other. It should look like this when you set it up:
[tex](f + g)(x) = (4x {}^{2} - 6x - 1) + (x {}^{2} - 5x + 3)[/tex]
Then just add like terms and you should get:
[tex](f + g)(x) = 5x {}^{2} - 11x + 2[/tex]
Hope this helped.
