Question

Só a 2 preciso muito

Answer 1

Resposta:

a) D = -44 e b) D = -4

Explicação passo a passo:

a)

$1 \times \left[\begin{array}{cc}4&2\\2&-3\end{array}\right] - 1\times \left[\begin{array}{cc}-2&2\\1&-3\end{array\right]} +3 \times \left[\begin{array}{cc}-2 &4 \\1&2\end{array}\right] = \\ \\1\times (-12-4) - 1 \times(6-2) + 3\times (-4-4) = \\ \\-16-4-24=-44$

b)

$2 \times\left[\begin{array}{cc}0 & 2\\4 &2 \end{array}\right] - 1 \left[\begin{array}{cc}1 & 2\\1 &2\end{array}\right] + 3 \left[\begin{array}{cc} 1& 0\\1 &4\end{array} \right] = \\ \\2 \times(-8) - 1 \times (2-2) + 3\times (4) = \\ \\-16+12 = -4$