I think I got it, thanks for the help! (: if you want you can check over what i did to see if i got the right idea:
to find f'(x) i used synthetic division and got x2+4x+4, then i factored it so i could do the sign analysis and got 2(x+2)(x-1)(2x-1)
Increase - (-2, 1/2)U(1,infinity)
Decrease - (-infinity, -2)U(1/2,1)
To find f''(x) i simply used product rule (f'gh+fg'h+fgh') and got (2x-1)(2x+4) and did sign analysis
Concave up - (-infinity,-1/2)U(1/2,infinity)
Concave down - (-1/2, 1/2)
... of course this is trying to compress 3/4 pages of work into a post, but i think you get the general idea.