Systems of linear equations: System of linear equations and matrices
Row reduction of a matrix to a reduced echelon form
Determine the reduced row echelon form of the matrix \[\matrix{1 &-4 & 2 &1 \\
1 &-20 &-6 &-31 \\
-1 &4 &14 &31 \\}\] You can enter an intermediate result to check whether you're still on the right track.
1 &-20 &-6 &-31 \\
-1 &4 &14 &31 \\}\] You can enter an intermediate result to check whether you're still on the right track.
| \(\matrix{1 &-4 & 2 &1 \\ 1 &-20 &-6 &-31 \\ -1 &4 &14 &31 \\}\sim{} \) |
\Box &\Box &\Box &\Box \\
\Box &\Box &\Box &\Box}\)
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