Question

Find the inverse
a matrix:
1 2 5
2 3 1
-1 1 1​

Answer 1

inverse

$\left[\begin{array}{ccc}-1&-2&-5\\-3&-3&-1\\1&-1&1\end{array}\right]$

Answer 2

Inverse

$\purple{\left[\begin{array}{ccc}-1&-2&-5\\-2&-3&-1\\1&-1&-1\end{array}\right]}$