Homework Statement
2. The attempt at a solution
So part a. makes sense to me, it basically comes down to
A1 =
1 -1 -1
-1 1 1
-1 1 1
A2 =
1 -1 -1
-1 2 -2
-1 -2 11
I'm not sure how to approach part b. because the question doesn't make much sense to me...