Question

 Determine A.B – A.C ​

Answer 1

Resposta:

Explicação passo-a-passo:

$\displaystyle \left[\begin{array}{ccc}1&5\\-4&1\end{array}\right] .\left[\begin{array}{ccc}2&-2\\-3&0\end{array}\right] -\left[\begin{array}{ccc}1&5\\-4&1\end{array}\right] .\left[\begin{array}{ccc}1&0\\-1&4\end{array}\right]=\\\\\\ \left[\begin{array}{ccc}2-15&-2\\-8-3&8\end{array}\right] -\left[\begin{array}{ccc}1-5&20\\-4-1&4\end{array}\right]= \left[\begin{array}{ccc}-13&-2\\-11&8\end{array}\right] -\left[\begin{array}{ccc}-4&20\\-5&4\end{array}\right] =$

$\displaystyle \left[\begin{array}{ccc}-13-(-4)&-2-20\\-11-(-5)&8-4\end{array}\right] =\left[\begin{array}{ccc}-13+4&-22\\-11+5&4\end{array}\right] =\left[\begin{array}{ccc}-9&-22\\-6&4\end{array}\right]$