ECZ 2020 · O-Level Paper 1 — Matrices
Given that M = -3-1420-2 and N = -21, find (b) MN as a single matrix.
- A. 7-10-2
- B. 5-62
- C. 5-6-2
- D. MN is not possible
Verified working — step 1
A (3 × 2) matrix times a (2 × 1) column gives a (3 × 1) column: each ROW of M runs down the column N - mind the negative-times-negative products.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.
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