Use the adjoint method to find the inverse:
[
−
1
4
−
4
2
]
−
1
=
\displaystyle {\left[\begin{array}{cc} -{1}&{4}\\-{4}&{2}\end{array}\right]}^{{-{1}}}=
[
−
1
−
4
4
2
]
−
1
=
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Enter each element of the matrix as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)