Differentiate the following by either, Product Rule, Function of a Function or Quotient Rule

1. $\displaystyle x\sqrt{(x+1)}$ : I Think this one is the Product Rule

2. $\displaystyle (x^2 - 8)^3$ : Guessing this is Function of a Function

3. $\displaystyle \frac{x}{(x+1}$ : : And this one I believe is Quotient Rule

as to how you work them out I wouldn't have a clue lol

Thanks for any help