-- Sep 6 In-Class Exercise Thread
`[[1,2,3],[4,5,6],[7,8,9]]`
Row 1 plus row 3 into row 3
`[[1,2,3],[4,5,6],[8,10,12]]`
-2 * row 2 plus row 3 into row 3
`[[1,2,3],[4,5,6],[0,0,0]]`
-4 * row 1 plus row 2 into row 2
`[[1,2,3],[0,-3,-6],[0,0,0]]`
Upper triangular, multiply diagonal..
`1*-3*0=0`
(
Edited: 2017-09-06)
@BT@[[1,2,3],[4,5,6],[7,8,9]]@BT@
Row 1 plus row 3 into row 3
@BT@[[1,2,3],[4,5,6],[8,10,12]]@BT@
-2 * row 2 plus row 3 into row 3
@BT@[[1,2,3],[4,5,6],[0,0,0]]@BT@
-4 * row 1 plus row 2 into row 2
@BT@[[1,2,3],[0,-3,-6],[0,0,0]]@BT@
Upper triangular, multiply diagonal..
@BT@1*-3*0=0@BT@