Essays / Meaning of "Memo & Articles of association are the constitution of a limited company" [4]

Hi

I pass my law assignment last year, thanks to your advices.
I'd be appriciated if you could help me out this assignment:

"the memo and articles of association are the constitution of a limited company. discuss the meaning of this statement and the relationship between the 2 documents, including how they control the wayy that a company deals with its shareholders"

what would be the main points that i should concentrate on? and what legislation + cases law are related to it?

Many thanks.

Pham