hey guys- these type of questions I dont even know where to begin..

Suppose a 3 x 3 matrix A can be transofrmed into a 3 x 3 matrix B by the following row operations;

R2 = R2 - 2R1 , R2 <--> (interchange) R3 and R3 = 1/3 R3

and that E F and G are the corresponding elementary matrices

a) write down the matrices E F G and express B in terms of A E F G ??

B) if det(a) =/= 0 then find det(b)/det(a)

What does all that mean- I didn't understand a single word what that question or even the information was telling me....

can some one explain it to me and also do the working out thanks

I dont understand the question nor the information....

First I started off like this

A = ( a b c )

( d e f )

( g h i )

I applied all those row operations and then i completly lost it

Can someone explain to what is elementry matrix ? I tried wikipedia but still coudn't understand it and also what exactly does the question even mean....