Question

URGENTE!!!
dá aquela moral
quem responder só pelos pontos vai ser denunciado

Answer 1

$\left[\begin{array}{ccc}8&12\\-4&2\\16&5\end{array}\right]-X=\left[\begin{array}{ccc}6&6\\0&9\\1&2\end{array}\right] \\\\\\ X = \left[\begin{array}{ccc}8&12\\-4&2\\16&5\end{array}\right]-\left[\begin{array}{ccc}6&6\\0&9\\1&2\end{array}\right] \\\\\\ X=\left[\begin{array}{ccc}8&12\\-4&2\\16&5\end{array}\right]+\left[\begin{array}{ccc}-6&-6\\0&-9\\-1&-2\end{array}\right] \\\\\\ X=\left[\begin{array}{ccc}8&6\\-4&-7\\15&3\end{array}\right]$