Question

Alguém pode me ajudar por favor!!!

Answer 1

$\left[\begin{array}{ccc}3&2&1\\1&2&5\\1&-1&0\end{array}\right] =\\ \\ \left[\begin{array}{ccccc}3&2&1&3&2\\1&2&5&1&2\\1&-1&0&1&-1\end{array}\right] =\\ \\ D=(3.2.0)+(2.5.1)+(1.1.-1)-[(1.2.1)+(3.5.-1)+(2.1.0)]=\\ \\ D=0+10-1-(2-15+0)\\ \\ D=10-1-2+15\\ \\ D=25-3\\ \\ D=22$

____________________

$\left[\begin{array}{ccccc}0&1&3&0&1\\-4&2&5&-4&2\\-3&0&-1&-3&0\end{array}\right] =\\ \\ D=(0.2.-1)+(1.5.-3)+(3.-4.0)-[(3.2.-3)+(0.5.0)+(1.-4.-1)]\\ \\ D=0-15+0-(-18+0+4)\\ \\ D=-15+18-4\\ \\ D=-19+18\\ \\ D=-1$