Question

Me ajudem ! Passo a passo e resposta

Answer 1

Resposta:

Explicação passo-a-passo:

a)

$\left[\begin{array}{cc}2&5\end{array}\right].\left[\begin{array}{c\leq }7\\-2\end{array}\right]=\left[\begin{array}{c}2.7+5.(-2)\end{array}\right]=\left[\begin{array}{c}14-10\end{array}\right]=\left[\begin{array}{c}4\end{array}\right]=$

b)

$\left[\begin{array}{ccc}-3&4&3\end{array}\right].\left[\begin{array}{c}2&1&-3\end{array}\right]=\left[\begin{array}{c}-3.2+4.1+3.(-3)\end{array}\right]=\left[\begin{array}{c}-6+4-9\end{array}\right]=\left[\begin{array}{c}-11\end{array}\right]$