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A-
A
A+
If
+ 2A =
then A=?
C
+ 2A =
2A =
2A =
Dividing the matrix by 2
A =
1
+ 2A =
then A=?
+ 2A =
2A = 
2A = 
A = 
+ 2A =then A=?+ 2A = 2A = 2A = A =