The answer I came up with was -1/x^2+4, is this correct? Found 2 solutions by jim_thompson5910, checkley77:Answer by jim_thompson5910(35256) (Show Source):
You can put this solution on YOUR website! 2x/x^2+4 minus 2x-1/x^2+4
(2x-(2x-1))/(x^2+4)
(2x-2x+1/(x^2+4)
1/(x^2+4) ans.
You forgot that (-) times a (-) is = (+).