RowReduce
 Usage
Notes
 Further Examples
A non-singular matrix can be row-reduced to the identity matrix.
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For non-zero singular matrices, the last row reduces to zero and the last column cannot be zeroed (if not zero from the start).
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This performs row reduction modulo  on mm.
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You can use RowReduce to solve a system of linear equations. The matrix nn corresponds to the linear system {x + y - z  1, x + 2y + 5z 1, 2x + y + 3z -2}.
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The solution of the system is x =  , y =  , and z =  .
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This checks the answer.
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