Hi again!

I have a couple questions that I need help with.

The first one I have theanswerto but need a formula/proof/method/working/whatever you call it, to go with it.

The question:

The sum of a number and its reciprocal is 10/3. What is the number?

My answer:

3

--------------------------------

This next question confuses the (blank) out of me:

The question

((x^2 + 5x + 4)/(x + 3)^2)/((x + 1)/(x^2 - 9))

My answer:

???

Thank you in advance for your help!

Drakmord