Question

URGENTE!!!!
pra hoje, por favor, quem souber dá aquela moral
quem responder só pelos pontos vai ser denunciado

Answer 1

$X=\left[\begin{array}{ccc}7&-16\\12&19\\1&0\end{array}\right] -\left[\begin{array}{ccc}4&-21\\13&6\\8&-9\end{array}\right]$

$X=\left[\begin{array}{ccc}7-4&-16-(-21)\\12-13&19-6\\1-8&0-(-9)\end{array}\right]$

$X=\left[\begin{array}{ccc}7-4&-16+21\\12-13&19-6\\1-8&0+9\end{array}\right]$

$X=\left[\begin{array}{ccc}3&5\\-1&13\\-7&9\end{array}\right]$