My brain is not fuctioning! I'm dead by this weekend :(

At 12.25 a.m. on the 20th Jan 2009, there's a cute girl who is struggling to finish a simple question given in the 13th Math's exercise. Don't judge a book by it's cover. Although it looks easy dizzy but deym I still can't get it done! Eh, did I refer to myself just now?? Sorry.. The cute girl still can't find the f**king answer. How the hell this (one more time) cute girl will do in the exam on this weekend.

OMG, please help her and bless her with multi-purpose super functioning brain...Amin...