Question:medium
If the determinant of the matrix
\[
\begin{vmatrix}
1 & 2 \\
3 & x
\end{vmatrix}
\]
is equal to $-2$, then the value of $x$ is:
If the determinant of the matrix
\[
\begin{vmatrix}
1 & 2 \\
3 & x
\end{vmatrix}
\]
is equal to $-2$, then the value of $x$ is:
Show Hint
For every $2\times2$ determinant:
\[
\begin{vmatrix}
a & b
c & d
\end{vmatrix}
=ad-bc
\]
Multiply diagonally and subtract.
Updated On: May 16, 2026
- $2$
- $4$
- $6$
- $8$
Show Solution
The Correct Option is B
Solution and Explanation
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