Question

Alguém me ajuda pelo amor de Cristo

Answer 1

$A=(aij)2x2 \left[\begin{array}{ccc}11&12\\21&22\end{array}\right] \\\\ 2i+j = 2.1+1=3 \\\\ i ^{2} -2= 1^{2}-2=-1 \\\\ -2.j=-2.1=-2\\\\ 3.i+j=3.2+2=8\\\\ A=(aij)2x2 \left[\begin{array}{ccc}3&-1\\-2&8\end{array}\right]$