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if one is presented with an n x n where n = 4.

What is the rule called which allows the i'th row and the j'th column to be removed from the matrix in order to make calculating the determinant easier ?

Secondly if one wants to square [tex] \left[ \begin{array}{cccc} 2 & 5 & 7 & 6 \\ 2 & 9 & 2 & 1 \\ 0 & 1 & -2 & 1 \\ 6 & 7 & 1 & -5\end{array}\right ] ^2[/tex]

Do I square every element of matrix individually ?

/Bob

What is the rule called which allows the i'th row and the j'th column to be removed from the matrix in order to make calculating the determinant easier ?

Secondly if one wants to square [tex] \left[ \begin{array}{cccc} 2 & 5 & 7 & 6 \\ 2 & 9 & 2 & 1 \\ 0 & 1 & -2 & 1 \\ 6 & 7 & 1 & -5\end{array}\right ] ^2[/tex]

Do I square every element of matrix individually ?

/Bob

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