The other thing that can happen isn't super freaky... But, it will make your life a lot easier.
Let's say you're given this:
Notice that the squared guy is negative. This makes factoring a really creepy experience.
Remember... these guys are equations... So, all of our old tricks work.
Can we multiply both sides by -1 ? Sure can, Skippy! Do it!
Now, just rearrange it like you're used to: