If 
then A2 is equal to
Let A = 
∴ A2 = 
By matrix multiplication:
⇒ A2 = 
which matches with option (D)
∴ Option (D) is the correct answer.
58
If then A2 is equal to
Let A =
∴ A2 =
By matrix multiplication:
⇒ A2 = which matches with option (D)
∴ Option (D) is the correct answer.