Question

calcule a determinada de matriz A=[3 5 -2-1]​

Answer 1

Olá,

Matriz A:

$\tt \: A = \left[ \begin{array}{cc} \tt3 & \tt 5 \\ \tt - 2 & \tt -1\end{array}\right]$

Determinante de A:

$\tt \: det(A) = \left | \begin{array}{cc} \tt3 & \tt 5 \\ \tt - 2 & \tt - 1\end{array}\right |$

$\tt \: det(A) =3( - 1) - 5( - 2) \\ \\ \tt \: det(A) = - 3 + 10 \\ \\ \tt \: det(A) = 7$