- #1

mneox

- 36

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## Homework Statement

If my original echelon form is:

1 1 -2 1 | 2

0 3 3 3 | -3

0 0 0 1 | -4

and according to my notes that my teacher provided, the reduced form is:

1 0 -3 0 | 3

0 1 1 0 | 3

0 0 0 1 | -4

he noted that in the reduced form, the 1's in columns 1, 2, and 4 are pivots.

thanks for the help!

Or another question is, why is THIS in reduced row echelon form?

1 0 -2 0 | 9

0 1 -1 0 | 5

0 0 0 1 | 3

## Homework Equations

none

## The Attempt at a Solution

Now my question is why is the second 1 in row 2 not a pivot? why is there a -3 above the 1 in column 3? He stated that this matrix is in the reduced echelon form, so can someone just explain why its an rref if there's that -3?

Thanks for your help and time!

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