Ok guys, sorry if im posting this in the wrong section; dont know where quadratics belong.

Anyway, so I have a maths test next week, and my maths teacher handed out practice tests (from years back) for us to get a look at what we're dealing with. Anyway, im going pretty well with it, except theres 1 question im stuck at. Could you please help me do it?

Question: Factorize each of the following expressions, over R if necessary.

1)

2)

3)

4)

5)

Thanks