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## Homework Statement

I am having trouble figuring out lambda for the 3x3, I have only done 2x2.

My matrix:

4 1 4

1 7 1

4 1 4

## The Attempt at a Solution

I know that when I add lambda (L) in it looks like

4-L 1 4

1 7-L 1

4 1 4-L

When I do a 2x2, I would just cross multiply as my next step then solve for L values, but I don't know how to do that here. Any help would be appreciated!