ECZ 2024 · O-Level Paper 1 — Matrices
Given that A = 4511 and B = x - 1120, find x if AB = 10421.
- A. 1
- B. 0
- C. 2
- D. 4
Verified working — step 1
You do not need the whole product - one entry of AB is enough to trap x. Use the top-left entry: row 1 of A across, column 1 of B down.The full step-by-step working and final answer, plus the video lesson for this topic, 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.
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