1. lim as x goes to 2...(x^2 - 4)/(x-2)

2. lim as x goes to 0...sin 2x + x^2 cos 5x

3. lim as x goes to 0 from the negative side... [(square root)x^2]/x

as ive said, ive gotten all the limits, but I need to tell which theorem i used.... we can only use like the 5 most basic ones, and i cant see how any of them apply to any of these