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Practice problem

Computing Determinants of 2×2 or 3×3 Matrices

By Cameron Montag
+2 contributors
Contributors
∣x2241∣=∣1−1−2x∣≠1\begin{vmatrix} x^2 & 2 \\ 4 & 1 \end{vmatrix} = \begin{vmatrix} 1 & -1 \\ -2 & x \end{vmatrix} \neq 1

Find xx.

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Type a concept, like “slope” or “photosynthesis”.

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