Begin by grouping the terms like this
You can see that (x+2) is a factor of both terms, and now it can be fatored out like so
Does that help? There are alot of ways to approach expressions of degree>2. Your goal is to know them all and to be able to know when is the right time to use the appropriate method.
Oh, I almost forgot. You need the linear factor in the form (x-a), but x+2=x-(-2), therefore a=-2