First step I did all the factor:

-And then factoring the denominator again I got: ; but I have a question here, and I think it's just because I'm really tired, but can I factor ? I keep thinking but my brain's not working.

-Anyway, I cancelled the from the numerator / denominator and then evaluated the limit using direct substitution and I got zero. My book says that's wrong though. If anyone has a chance to throw me a tip for these two questions I'd really appreciate it!