Let's just dive right in!
What can you undistribute (no, that's not a real word) in this?
If you don't believe me, distribute
the 2 back in to see if it works.
This is one of the main games of factoring -- undistributing things. We'll call it "taking out" or "factoring out."
What can we take out of this?
OK, now check this guy out -- and be careful! Always distribute to check it.