Question

urgente!!! só a questão F

Answer 1

Resposta:

$\left[\begin{array}{cc}2&7\\4&1\end{array}\right]$

Explicação passo-a-passo:

At=              +     B=

$\left[\begin{array}{cc}1&2\\2&3\end{array}\right]$                         $\left[\begin{array}{cc}1&5\\2&-2\end{array}\right]$  

= $\left[\begin{array}{cc}2&7\\4&1\end{array}\right]$