Thanks for the great and very useful explanation. Could you please tell me how you transform the X from column into a matrix form in the last exercise (26.36)?
The Munit function is available in the latest versions of MS Excel...so don't worry in that case manually type the elements of the identity matrix of the desired order.
@@ayamalak6422 for this use the 'MINVERSE' function for inverse and 'MMULT' function for multiplication of matrices as explained in the video, and these functions are available in all versions of excel.
