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Determinant of a $$2\times2$$ Matrix
## Formula
For:
$$A=\begin{bmatrix}a&b\\c&d\end{bmatrix}$$
the determinant is:
$$|A|=ad-bc$$
## Usage
- Used to determine invertibility and calculate the inverse of a $2\times2$ matrix.
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Determinant of a $$2\times2$$ Matrix
## Formula
For:
$$A=\begin{bmatrix}a&b\\c&d\end{bmatrix}$$
the determinant is:
$$|A|=ad-bc$$
## Usage
- Used to determine invertibility and calculate the inverse of a $2\times2$ matrix.
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