If |x² x 1; 4 2 1; 9 3 1| = 0, then x equals:
If |x² x 1; 4 2 1; 9 3 1| = 0, then x equals:
- A. 2 or 3
- B. 4 or 9
- C. 2 or 4
- D. 3 or 9
Answer: A) 2 or 3
Explanation: The determinant is zero if any two rows are identical. R2 corresponds to 2, R3 to 3. So x=2 or x=3.
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