If A is a square matrix such that A² = I, then (A – I)³ + (A + I)³ – 7A is equal to
A. A
B. I – A
C. I + A
D. 3 A
Answer:A
If A is a square matrix such that A² = I, then (A – I)³ + (A + I)³ – 7A is equal to
A. A B. I – A C. I + A D. 3 A