Place the cursor over the image to start the animation.
All entries left blank in the determinant below are zeros.
Click on the image for a step by step proof.
A nonzero matrix is said to be in row echelon form if its first row is a nonzero row and each nonzero row bellow the first has strictly more leading zeros then the previous row.
A nonzero matrix which is in row echelon form is said to be in reduced row echelon form if the leading entries off all nonzero rows are 1 and this 1 is the only nonzero entry in its column.