MATLAB will find the row reduced echelon form of a matrix and save you the trouble of tedious computations. You open matlab. You will see >>. Then next to it you type the following:
Then press enter on your keyboard. It will give the following.
1 0 0 -3
0 1 0 2
0 0 1 1
In usual notation, this is the row reduced echelon form of the matrix
In using MATLAB, you press shift enter to go to a new line. One thing might be helpful to mention about MATLAB. It is very good at manipulating matrices and vectors and there is distinctive notation used to accomplish this. For example say you type
and then press “enter”. You will get 2,6,12. You would get an error if you wrote x*y. Similarly, type
and press “enter”. This yields 2,2,2,2. The expression [2,4,6,8]/[1,2,3,4] doesn’t make any sense.