The inverse of matrix
$\left[\begin{array}{rrr}
2 & 1 & -1 \
2 & 2 & -1 \
-1 & -1 & 1
\end{array}\right] \text { is }\left[\begin{array}{rrr}
1 & 0 & 1 \
-1 & 1 & 0 \
0 & 1 & 2
\end{array}\right]$
Solve the following system by the method of inverse matrix.
$\begin{array}{c}
2 x+y-z=2 \
2 x+2 y-z=4 \
-x-y+z=-1
\end{array}$

Question

The inverse of matrix 
$\left[\begin{array}{rrr}
2 & 1 & -1 \
2 & 2 & -1 \
-1 & -1 & 1
\end{array}\right] \text { is }\left[\begin{array}{rrr}
1 & 0 & 1 \
-1 & 1 & 0 \
0 & 1 & 2
\end{array}\right]$
Solve the following system by the method of inverse matrix.
$\begin{array}{c}
2 x+y-z=2 \
2 x+2 y-z=4 \
-x-y+z=-1
\end{array}$

Quizplus · Accepted Answer

The Answer of The inverse of matrix 
$\left[\begin{array}{rrr}
2 & 1 & -1 \
2 & 2 & -1 \
-1 & -1 & 1
\end{array}\right] \text { is }\left[\begin{array}{rrr}
1 & 0 & 1 \
-1 & 1 & 0 \
0 & 1 & 2
\end{array}\right]$
Solve the following system by the method of inverse matrix.
$\begin{array}{c}
2 x+y-z=2 \
2 x+2 y-z=4 \
-x-y+z=-1
\end{array}$

The Inverse of Matrix Solve the Following System by the Method of Inverse Matrix