 Hello friends, welcome to the session. I am Alka. We are going to discuss matrices. We have to compute the indicated products Our two given matrices are a b minus b a and a b b a. Now, let's start with the solution Let a equal to matrix a b minus b a and b equal to matrix a b b a now We see that a is a 2 cross 2 matrix and B is also 2 cross 2 matrix therefore the resultant a b will also be a 2 cross 2 Matrix now, let's start the product a b equal to a Into a plus b into v a into minus b plus b into a minus b into a Plus a into v Minus b into minus b plus a into a This is equal to a square plus b square Minus a b plus a b Minus b a Plus a b Minus b plus b square plus a square This is equal to a square plus b square 0 then again 0 a square plus b square Therefore a b equal to matrix a square plus b square 0 then 0 a square plus b square Which is also a 2 cross 2 matrix. Hope you understood it and enjoyed the session. Goodbye and take care