ECZ 2020 · GCE Paper 1 — Matrices
Given that A = 2310, B = -10x2 and C = 76-10, find (b) x for which AB = C.
- A. 1
- B. 7
- C. 3
- D. -3
Verified working — step 1
Only ONE entry of AB contains x - find it, then match it against the same position in C.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