Find the value of the determinant |−1 7; 2 4|
Find the value of the following determinant.
\[\begin{vmatrix} -1 & 7 \\ 2 & 4 \end{vmatrix}\]1 answer
Answer: \(-18\)
Value of a determinant \(= ad - bc\).
\[\begin{vmatrix} -1 & 7 \\ 2 & 4 \end{vmatrix} = (-1)\times 4 - 7\times 2 = -18\]
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· 24 Oct 2026
AI-verified · Oct 2026
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