Consider the following in respect of matrices A and B of same order:1) A2 – B2 = (A + B) (A – B)2) (A – I) (I + A) = O ⇔ A2 = IWhere I is the identity matrix and O is the null matrix.Which of the above is/are correct?

Consider the following in respect of matrices A and B of same order:1)

1.	Consider the following in respect of matrices A and B of same order:1) A2 – B2 = (A + B) (A – B)2) (A – I) (I + A) = O ⇔ A2 = IWhere I is the identity matrix and O is the null matrix.Which of the above is/are correct?
A.	1 only
B.	2 only
C.	Both 1 and 2
D.	Neither 1 nor 2
Answer» C. Both 1 and 2