Question

Me ajudem, fazendo favor!!!

Answer 1

Resposta:

$2) \\ a_{11} + a_{21} - a_{32} = 1 + ( - 5) - 2 = 1 - 5 - 2 = - 6 \\ \\ 3) \\ a_{11}.a_{22} - a_{12}.a_{21} \\ 3.5 - 0.7 \\ 15 - 0 \\ 15$