ECZ 2025 · O-Level Paper 1 — Quadratic Functions
The graph of y = -x2 + 12x - 11 is shown. Find the maximum value of y.
- A. 11
- B. 36
- C. 25
- D. -25
Verified working — step 1
y = -x2 + 12x - 11The 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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