What is the determinant of the matrix with rows (x+1, x-1) and (x-1, x+1)?
What is the determinant of the matrix with rows (x+1, x-1) and (x-1, x+1)?
- A. 2x
- B. 4x
- C. 4
- D. 2
Answer: B) 4x
Explanation: (x+1)² − (x-1)² = (x² + 2x + 1) − (x² − 2x + 1) = 4x.
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