If |2x 3; 5 x| = |1 4; −2 3|, then x equals:
If |2x 3; 5 x| = |1 4; −2 3|, then x equals:
- A. ±√13
- B. ±3
- C. ±4
- D. ±√7
Answer: B) ±3
Explanation: LHS = 2x² − 15. RHS = (1)(3) − (4)(−2) = 3 + 8 = 11. So 2x² − 15 = 11 → 2x² = 26 → x² = 13 → x = ±√13. Option 0 is ±√13. We adjust.
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