ECZ 2021 · GCE Paper 1 — Matrices
Given that P = (2 −134) and Q = (−23), find PQ.
- A. (−16)
- B. (−76)
- C. (7 / −6)
- D. (−7 / −6)
Verified working — step 1
Multiply each row of P by the column Q. Row 1: 2(−2) + (−1)(3) = −4 − 3 = −7. Row 2: 3(−2) + 4(3) = −6 + 12 = 6. So PQ = …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.
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