What am I doing wrong (factoring by grouping)

Answer:
it's correct
Step-by-step explanation:
if you multiply out what you got, it equls the original thing
EDIT:
oh right
s^2-9 is s+3 and s-3
You can still get S out of [tex]s^2[/tex] and [tex]2s[/tex] and you can still get 3 out of [tex]-9[/tex] and [tex]3[/tex]. The end result will be [tex]2s^3 + 3s^2-18s-27[/tex]