Question

Me ajudem por favor, a questão está na imagem acima

Answer 1

Resposta:

Explicação passo a passo:

$A=\left[\begin{array}{ccc}1&5\\-3&4\\\end{array}\right]$

$B=\left[\begin{array}{ccc}-3&2\\0&1\\\end{array}\right]$

$a)$

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

$b)$

$A-B=\left[\begin{array}{ccc}4&3\\-3&3\\\end{array}\right]$

$c)$

$3A-B=$

$3A=\left[\begin{array}{ccc}3&15\\-9&12\\\end{array}\right]$

$3A-B=\left[\begin{array}{ccc}3&15\\-9&12\\\end{array}\right]-\left[\begin{array}{ccc}-3&2\\0&1\\\end{array}\right]=\left[\begin{array}{ccc}6&13\\-9&11\\\end{array}\right]$