i know the extension 1 math exam answers have been on the internet since like the day after the exam (dont know the accuracy of them but they were kinda similar to mine {as in they referred to the questions and took similar steps, not trying to brag}.. as well as being logical)
hopefully the question paper is on BOS cuz they arent here :
http://www.hsccoaching.com/Resources/2010 Ext1.pdf
they were the solutions i used to kinda check
EDIT: and theres ext 2
http://www.hsccoaching.com/Resources/2010 Ext1.pdf woops! forgot to add it initially because it wasn't revelant to me, how selfish