- #1

sarahfh

- 1

- 0

Example:

5 1 0 0 x1 1

-1 5 1 0 x2 2

0 -1 5 1 x3 3

0 0 -1 5 x4 4

Is it possible to solve the upper triangle and lower triangle and then combine them?

Would it be possible to solve it quicker if the all three diagonals were the same (as above)?