Question

Calcule o determinante da matriz

A=Г 3 5ㄱ
[ -2 -1 ]

Answer 1

Explicação passo-a-passo:

$A=\left[\begin{array}{ccc}3&5\\-2&-1\\\end{array}\right]$

Calculando o determinante:

$detA=\left|\begin{array}{ccc}3&5\\-2&-1\\\end{array}\right|\\\\detA=3.(-1)-5.(-2)\\\\detA=-3+10\\\\detA=7$