ECZ 2022 · GCE Paper 2 · Question 4 — Matrices
Matrix N = x22x6.
(a(i)) Find the value of x for which the determinant of N is 8.[2]
Verified working — step 1
N = x22x6(a(ii)) Hence or otherwise, write N-1.[2]
Verified working — step 1
With x = 4: N = 4286, det(N) = 8(b) Solve the equation 5x2 - 9x - 4 = 0, giving your answers correct to 2 decimal places.[5]
Verified working — step 1
5x2 - 9x - 4 = 0The 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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