Question

Me ajudem por favor ​

Answer 1

Explicação passo-a-passo:

$\left[\begin{array}{ccc}-7&-3\\4&8\\-1&-6\end{array}\right].\left[\begin{array}{ccc}2&-5&3\\1&4&9\\\end{array}\right]$

$\left[\begin{array}{ccc}-7.2+(-3).1&-7.(-5)+(-3).4&-7.3+(-3).9\\4.2+8.1&4.(-5)+8.4&4.3+8.9\\-1.2+(-6).1&-1.(-5)+(-6).4&-1.3+(-6).9\end{array}\right]$

$\left[\begin{array}{ccc}-14-3&35-12&-21-27\\8+8&-20+32&12+72\\-2-6&5-24&-3-54\end{array}\right]$

$\left[\begin{array}{ccc}-17&23&-48\\16&12&84\\8&-19&-57\end{array}\right]$

quarta alternativa