Question

calcule det x, sabendo que 2a + x = b - a ​

Answer 1

Resposta:

276

Explicação passo-a-passo:

2A = $\left[\begin{array}{ccc}2&4&6\\0&2&4\\-2&4&0\end{array}\right]$

B-A = $\left[\begin{array}{ccc}-1&-1&-2\\2&2&-1\\0&-2&4\end{array}\right]$

X = (B-A) - 2A = $\left[\begin{array}{ccc}-3&-5&-8\\2&0&-5\\2&-6&4\end{array}\right]$

detX = 0 + 50 + 96 + 40 + 90 + 0 = 276