Question

Resolva a equação matricial:
$\left[\begin{array}{ccc}-7&2&1\\6&4&-3\\\end{array}\right] + 2* x = \left[\begin{array}{ccc}11&0&1\\8&12&5\\\end{array}\right]$

Answer 1

$\displaystyle 2x = \left[\begin{matrix}11&0&1\\8&12&5\end{matrix}\right] - \left[\begin{matrix}-7&2&1\\6&4&-3\end{matrix}\right] \\ \\ \\ 2x = \left[\begin{matrix}11+7&0-2&1-1\\8-6&12-4&5+3\end{matrix}\right]\\ \\ \\ 2x = \left[\begin{matrix}18&-2&0\\2&8&8\end{matrix}\right]\\ \\ \\ x = \frac{1}{2}\left[\begin{matrix}18&-2&0\\2&8&8\end{matrix}\right]\\ \\ \\ \large\boxed{x =\left[\begin{matrix}9&-1&0\\1&4&4\end{matrix}\right]}$