A=[01−10]
A2=[01−10][01−10]=[−100−1]
A3=[−100−1][01−10]=[0−110]
A4=[0−110][01−10]=[1001]
Option (1) A3+I=A(A3−I)
[01−10][−1−11−1]=[1−111]
[1−111] = [1−111] .....Correct
Option (2) A4−I=A2+I
[0000]=[0000] ....Correct
Option (3) [0000]=[01−10]×[−200−2]=[0−220] .....Incorrect
Option (4)
A3−I=A(A−I)
[−1−11−1]=[01−10]×[−11−1−1]=[−1−11−1]
......Correct.