Question 22
Matrices and DeterminantsIf Q = (9 −2; −7 4), then |Q| is (matrix written row by row)
- A.−50
- B.−22
- C.22
- D.50
Show the answer and explanation
Answer: C (22)
Explanation
|Q| = 9 × 4 − (−2)(−7) = 36 − 14 = 22.
If Q = (9 −2; −7 4), then |Q| is (matrix written row by row)
Answer: C (22)
|Q| = 9 × 4 − (−2)(−7) = 36 − 14 = 22.