Question

URGENTE !!! Calcule o determinante da matriz abaixo.

Answer 1

$\sf A=\left[\begin{array}{c c}\sf2&\sf-3\\\sf4&\sf8\end{array}\right]$

$\sf det\,A=2\cdot8-(-3)\cdot4$

$\sf det\,A=16+3\cdot4$

$\sf det\,A=16+12$

$\red{\sf det\,A=28}$