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Determinants
Xam Idea
CBSE
Grade 12

Question:

If $\begin{vmatrix} x & 8 \\ 2 & x \end{vmatrix} = 0$, then $x$ is equal to:
(a) $\pm 4$
(b) $4$
(c) $-4$
(d) $16$

Step-by-Step Solution

Key Concept: x^2 - 16 = 0 => x = pm 4.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: $\pm 4$
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