Question

ATIVIDADE DE MATRIZES

Answer 1

Olá!

Questão a)

$A+B=\left[\begin{array}{cc}2+1&1+5\\3+2&2+(-2)\end{array}\right] \\ \\ \\ \boxed{A+B=\left[\begin{array}{cc}3&6\\5&0\end{array}\right] }$

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Questão b)

$A-B=\left[\begin{array}{cc}2-1&1-5\\3-2&2-(-2)\end{array}\right] \\ \\ \\ \boxed{A-B=\left[\begin{array}{cc}1&-4\\1&~~4\end{array}\right] }$

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Questão c)

$B-A=\left[\begin{array}{cc}1-2&5-1\\2-3&-2-2\end{array}\right] \\ \\ \\ \boxed{A-B=\left[\begin{array}{cc}-1&~~4\\-1&-4\end{array}\right] }$

:)