Answer
$A^{-1}\approx\left[\begin{array}{rrr}
{0.26}&{-0.29}&{-0.20}\\
{-1.21}&{1.63}&{1.20}\\
{-1.84}&{2.53}&{1.80}\end{array}\right]$
Work Step by Step
Using desmos.com/matrix
select "New matrix", define the dimensions, and enter the matrix entries...
(see screenshot)
Rounding to two decimal places,
$A^{-1}\approx\left[\begin{array}{rrr}
{0.26}&{-0.29}&{-0.20}\\
{-1.21}&{1.63}&{1.20}\\
{-1.84}&{2.53}&{1.80}\end{array}\right]$
