Can you show your steps? I'm not sure I buy your answer.
Sorry =/, I took it and uploaded it to tinypic ( http://i56.tinypic.com/14t1wdw.jpg ).
Yep thats correct
Well, I would still follow dwsmith's advice and simplify first. What does that give you? (You can double-click on my LaTeX output to find out how to type in math. You need to use [tex] and [/ math] delimiters to get math to show up (although the closing one there should not have a space between the / and the math)).