ECZ 2015 · O-Level Paper 1 — Matrices
Given that P = 3-412, express P² as a single matrix.
- A. 5-2050
- B. 91614
- C. 5-2054
- D. 6-824
Verified working — step 1
P² = P × P. Row 1: 3×3 + (−4)×1 = 5 and 3×(−4) + (−4)×2 = −20. Row 2: 1×3 + 2×1 = 5 and 1×(−4) + 2×2 = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question