2 - Calcule o menor complementar do elemento a23 da matriz.
$A = [\begin{array}{cccc} 0 & 4 & - 2 & 4 \\ - 6 & 2 & 10 & 0 \\ 5 & 8 & - 5 & 2 \\ 0 & - 2 & 1 & 0 \end{array}]$

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Answer

$- 40$ is the minor complement of the element a23 in the matrix.

Steps

Step 1 ：Remove the second row and third column from the matrix: $A_{m i n o r} = [\begin{array}{ccc} 0 & 4 & 4 \\ 5 & 8 & 2 \\ 0 & - 2 & 0 \end{array}]$

Step 2 ：Calculate the determinant of the remaining 3x3 matrix: $det (A_{m i n o r}) = (0) (8) (0) + (4) (2) (0) + (4) (5) (- 2) - (4) (8) (0) - (4) (5) (0) - (0) (2) (- 2) = - 40$

Step 3 ： $- 40$ is the minor complement of the element a23 in the matrix.

2 - Calcule o menor complementar do elemento a23 da matriz.A=[04−24−6210058−520−210]

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2 - Calcule o menor complementar do elemento a23 da matriz.
$A = [\begin{array}{cccc} 0 & 4 & - 2 & 4 \\ - 6 & 2 & 10 & 0 \\ 5 & 8 & - 5 & 2 \\ 0 & - 2 & 1 & 0 \end{array}]$