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Former user · 20 May 2026, 06:22 (UTC+00:00)

Added 2x2 determinant formula

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# Formula for the determinant of a 2-by-2 matrix.

Put content here.**Formula:** For a $2 \times 2$ matrix:
$$\det\begin{pmatrix} a & b \\ c & d \end{pmatrix} = ad - bc$$

# Parents

* Particular types of matrices

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