Question

dada as matrizes....
me ajudem porfavor , a pergunta está na foto​

Answer 1

Resposta:

Olá boa tarde!

$B*A=\left[\begin{array}{ccc}1&1\\-1&1\end{array}\right] *\left[\begin{array}{ccc}3&2\\7&5\end{array}\right]$

$B*A=\left[\begin{array}{ccc}1*3+1*7&1*2+1*5\\-1*3+1*7&1*2+1*5\end{array}\right]$

Resposta:

$B*A=\left[\begin{array}{ccc}10&7\\4&7\end{array}\right]$