Question

Alguém poderia me ajudar ? ​

Answer 1

$A)\\\left[\begin{array}{ccc}3&2&5\\4&1&3\\2&3&4\end{array}\right] = x\\\\x=3.1.4-5.1.2\\x=12-10\\x=2\\\\B)\left[\begin{array}{ccc}0&3&0\\-2&3&1\\4&-2&5\end{array}\right] =x\\\\x=0.3.5-0.3.4\\x=0\\\\C)\left[\begin{array}{ccc}2&1&0\\1&1&1\\4&3&0\end{array}\right] =0\\\\x=2.1.0-0.1.4\\x=0$