Question

Calcular o valor de 3a+b²

Obs, as matrizes A e B estão na imagem anexadas

Answer 1

$3. \left[\begin{array}{ccc}-3&2\\-5&1\end{array}\right] + \left[\begin{array}{ccc}2&6\\4&10\end{array}\right].\left[\begin{array}{ccc}2&6\\4&10\end{array}\right] =$$\left[\begin{array}{ccc}-9&6\\-15&3\end{array}\right] + \left[\begin{array}{ccc}4+24&12+60\\8+40&24+100\end{array}\right]=$ $\left[\begin{array}{ccc}-9&6\\-15&3\end{array}\right] + \left[\begin{array}{ccc}28&72\\48&124\end{array}\right]=$ $\left[\begin{array}{ccc}19&78\\33&127\end{array}\right]$