Question

CALCULE O VALOR DO DETERMINANTE DA MATRIZ A=

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Answer 1

$\left[\begin{array}{ccc}4&-1&0\\5&7&6\\2&1&3\end{array}\right] \left[\begin{array}{ccc}4&-1\\5&7\\2&1\end{array}\right]$

Det(A) = 84 - 12 + 0 - (0 + 24 - 15) → 72 - (9) → 72 - 9 → Det(A) = 63