Math Chapter Wise Matrices And Determinants English MCQ PGT 2010 Q.Which of the following is incorrect? AA2 –B2 = (A+B)(A–B) B(AT)T = A C(AB)n = An Bn where A, B commutue D(A–I) (I+A) = 0⇔A2 =I Show answer Correct answer: A2 –B2 = (A+B)(A–B)