Question

Sabendo se a= -3 2 -5 1

Answer 1

Resposta:

Explicação passo-a-passo:

$a=\left[\begin{array}{cc}-3&2\\-5&1\end{array}\right]$ => $3.a=3.\left[\begin{array}{cc}-3&2\\-5&1\end{array}\right]=\left[\begin{array}{cc}-9&6\\-15&3\end{array}\right]$

$b=\left[\begin{array}{cc}2&6\\4&10\end{array}\right]=>b^{2}=\left[\begin{array}{cc}2&6\\4&10\end{array}\right].\left[\begin{array}{cc}2&6\\4&10\end{array}\right]=\left[\begin{array}{cc}2.2+6.4&2.6+6.10\\4.2+10.4&4.6+10.10\end{array}\right]=\left[\begin{array}{cc}28&72\\48&124\end{array}\right]$

Assim

3a + b² = $\left[\begin{array}{cc}-9&6\\-5&3\end{array}\right]+\left[\begin{array}{cc}28&72\\48&124\end{array}\right]=\left[\begin{array}{cc}-9+28&6+72\\-5+48&3+124\end{array}\right]=\left[\begin{array}{cc}19&78\\43&127\end{array}\right]$.