 Hello friends, welcome to the session. I am Malka. We are going to discuss matrices. We have to compute the indicated products A given matrix is 2 1 3 2 minus 1 1 and a second matrix is 1 0 1 minus 1 2 1 Well, let's start with the solution Let a equal to matrix 2 1 3 2 minus 1 1 and b equal to matrix 1 0 1 minus 1 2 1 Now we have to calculate the value of a b. Let's see a b equal to matrix 2 1 3 2 minus 1 1 multiply by the second matrix that is 1 0 1 minus 1 2 1 so this is equal to 2 into 1 plus 1 into minus 1 then 2 into 0 plus 1 into 2 Then 2 into 1 plus 1 into 1 similarly we write for the second row and third row This is equal to 2 minus 1 0 plus 2 2 plus 2 3 minus 2 0 plus 4 3 plus 2 minus 1 minus 1 0 plus 2 minus 1 plus 1 this is equal to 1 2 4 1 4 5 minus 2 2 0 Therefore a b equal to matrix 1 2 4 1 4 5 minus 2 2 0 which is a required answer Hope you understood the solution and enjoyed the session. Goodbye and take care