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Calculate Determinant
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det(\left(\begin{matrix}-1&1\\-1&2\end{matrix}\right))
Find the determinant of the matrix.
-2-\left(-1\right)
For the 2\times 2 matrix \left(\begin{matrix}a&b\\c&d\end{matrix}\right), the determinant is ad-bc.
-1
Subtract -1 from -2.