This lecture explains the row-reduced Echelon form and its illustrative examples. Other videos @DrHarishGarg Row reduced Echelon form: https://youtu.be/yCTfbsf60NA Rank of the matrix: https://youtu.be/Hd34nBwcBG8 Vector Subspaces: https://youtu.be/9uN7CwDqvZQ