 Hello and welcome to the session. Let us understand the following problem today. Let a is equal to matrix 2, 4, 3, 2, b is equal to matrix 1, 3, minus 2, 5, c is equal to matrix minus 2, 5, 3, 4, 5, a, b. Now let us write the solution. Given to us, a is equal to matrix 2, 4, 3, 2, and b is equal to matrix 1, 3, minus 2, 5. Now since number of column of a is equal to number of rows of b which is equal to 2, so we can multiply a and b. Therefore, a, b is equal to matrix 2, 4, 3, 2, multiplied by matrix 1, 3, minus 2, 5. Now, which is equal to matrix, multiplying first row with first column, so we get 2 into 1 plus 4 into minus 2. Then first row with second column, so we get 2 into 3 plus 4 into 5. Now second row with first column, so we get 3 into 1 plus 2 into minus 2. Then second row with second column, so we get 3 into 3 plus 2 into 5. Which is equal to 2, minus 8, 6 plus 20, 3 minus 4, 9 plus 10, which is equal to 2, minus 8, minus 6, 20 plus 6, 26, 3 minus 4, minus 1, 9 plus 10, 19. Hence, a, b is equal to minus 6, 26, minus 1, 19. Which is our required answer. I hope you understood the problem by and have a nice day.