"please help me out with these four algebra questions"

1. Rewrite the following using positive exponents only.
   xy ^-3
   -------
   x ^-2

2. Find the following quotients.
   9a³+3a²+6a
   --------------
   3a

3.  
   12x²-37x+21
   ------------------
   (4x-3)

4.  
   x² - 36
   ------------------
   (x+6)

Thank You!

1.  
   

2. Look for a common factor in the numerator and then perform any cancellation that you can. Now see if you can factor what remains.

3. Factor the numerator. I would try first to see if (4x - 3) is a factor in the numerator.

4. This is a place where the ability to recognize a pattern is important in algebra. You need to see that the numerator is a difference of squares and then use this fact to factor it.