Question

A= ( A  e J ) 2X2 DEFINIDA A e J = 3i-2j

Answer 1

$A=\left[\begin{array}{cc}a_{11}&a_{12}\\a_{21}&a_{22}\end{array}\right] \\ \\ A=\left[\begin{array}{cc}a_{3.1-2.1}&a_{3.1-2.2}\\a_{3.2-2.1}&a_{3.2-2.2}\end{array}\right] \\ \\ A=\left[\begin{array}{cc}1&-1\\4&2\end{array}\right]$