The value of the 2×2 determinant with rows (2, 4) and (5, 1) is:
The value of the 2×2 determinant with rows (2, 4) and (5, 1) is:
- A. -18
- B. 18
- C. 22
- D. -22
Answer: A) -18
Explanation: Determinant = (2 × 1) − (4 × 5) = 2 − 20 = −18.
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