1.4.43 Matrix Transformations

Condition: Find the form of the matrix \ (A \). \ [A = \ Left [\ Begin {Array} {CCCC} 4 & 1 & 1 & 1 & 1 &1 & -2 & -1 &1 &1 & 1 & 1 &1 &1 -6 & -1 & 4 & 2 ON {Array} \ RIGHT] \] \] \]