So I just finished my first week of calc and our weekend homework is to solve this one problem. We have to find the derivative of $\displaystyle y= x/ sqrt(3-x)$ using first principles.

I have no idea what I'm doing. It seems that every time I try to solve it I end up with a terribly long equation that doesn't seem to simplify. Any useful suggestions are welcome. Just please take into account I have just started learning calc.