Question

me ajudem pfv, preciso da resposta att amanhã​

Answer 1

Resposta:

Olá!

Explicação passo a passo:

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

$2A-B$

$2A=2.\left[\begin{array}{ccc}1&2\\2&3\\\end{array}\right]$

$2A=\left[\begin{array}{ccc}2.1&2.2\\2.2&2.3\\\end{array}\right]$

$2A=\left[\begin{array}{ccc}2&4\\4&6\\\end{array}\right]$

$2A-B=\left[\begin{array}{ccc}2&4\\4&6\\\end{array}\right]-\left[\begin{array}{ccc}-1&0\\2&-1\\\end{array}\right]$

$2A-B=\left[\begin{array}{ccc}2-(-1)&4-0\\4-2&6-(-1)\\\end{array}\right]$

$2A-B=\left[\begin{array}{ccc}2+1&4\\2&6+1\\\end{array}\right]$

$2A-B=\left[\begin{array}{ccc}3&4\\2&7\\\end{array}\right]$

Bons Estudos!