Determinants
Oswaal
CBSE
Grade 12
Question:
If $\begin{vmatrix} x & 3 \\ 12 & x \end{vmatrix} = 0$, then $x$ is:
(a) $\pm 6$
(b) $6$
(c) $-6$
(d) $0$
Step-by-Step Solution
Key Concept: x^2 - 36 = 0 => x = \pm 6.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: $\pm 6$
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