H
handoi986
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
Giúp với@@ Thanks!
\begin{bmatrix}
2 & 7 & 3 & 1\\
3 & 5 & 2 & 2\\
9 & 4 & 1 & 7
\end{bmatrix}*X=\begin{bmatrix}
6\\
4\\
2
\end{bmatrix}
\begin{bmatrix}
2 & 7 & 3 & 1\\
3 & 5 & 2 & 2\\
9 & 4 & 1 & 7
\end{bmatrix}*X=\begin{bmatrix}
6\\
4\\
2
\end{bmatrix}