Question

respostas por favor certo obrigada​

Answer 1

Resposta:

Explicação passo a passo:

$13)$

   $-B=\left[\begin{array}{ccc}56&-90\\-72&82\\\end{array}\right]$

$14)$

  $C^{\:t} =\left[\begin{array}{ccc}6&-7\\-9&8\\\end{array}\right]$