Question 9 • Advanced Algebra: Concepts and Connections
For a 3 × 3 matrix, expand the determinant along the first row: (−2)[(−1)(−5) − (−2)(3)] − 2[(4)(−5) − (−2)(1)] + (−5)[(4)(3) − (−1)(1)]. This gives −22 + 36 − 65 = −51. The determinant is −51, choice D.
AI-written and checked against the verified answer.