00:01
What i would recommend doing here for the gaustrogen elimination method is to write this as an augmented matrix.
00:07
So that would look like from the first equation 1, negative 1, negative 2, 1 with 0.
00:14
Second equation, 2 .1, negative 3, positive 2, negative 6.
00:20
Third equation, negative 1, negative 2, 1 ,33, and 4th 1, 1, 1, negative 1, 2, 1, 2, 1.
00:27
Then you want to get this to reduce row echelon form.
00:36
You can do this by hand and it will take some work or i'll just tell you what you should get if you have to do it by hand with row operations.
00:46
Or you can use a calculator...