Huh??
What matrix ?
find the inverse of the matrix [1 0 0 ] -1 1 0 1 1 1
Maybe you mean ?
\(\begin{bmatrix} 1&0& 0 \\ -1&1& 0\\ 1&1& 1\\ \end{bmatrix}\)
Let me think about this...........
If you enter this in Google
"how do you find the inverse of a 3x3 matrix"
You will find that a great many people are just dying to teach you this :))