I wasn't really asking for any calculations. More of a clarification of the solution. How to get the elementary matrices given in the picture to use them for reduction.

1 -2

0 1 how do you get that matrix, and the other 2 below it?

Jun 16th, 2015

I wasn't really asking for any calculations. More of a clarification of the solution. How to get the elementary matrices given in the picture to use them for reduction.

1 -2

0 1 how do you get that matrix, and the other 2 below it?