$\displaystyle (x^2 +5x+4)/(x^3 +x^2 -9x -9)$

just trying to find the vertical and horizontal asymptotes of this function...

hortizontal at 0.

the vertical asymptotes at -1, 3 and -3..just wondering if this is correct..

and how do i go on about finding where the discontinuities are in this function by looking at the graph...how would i work it out??

thanks