Q2.2 For any two square matrices, X 2 Rnn and Y 2 Rnn, show that a. trXY

Q2.2 For any two square matrices, X 2 Rnn and Y 2 Rnn, show that

a. tr¹XYº = tr¹YXº, and

b. tr¹X????1YXº = tr¹Yº if X is invertible.