ECZ 2020 · O-Level Paper 1 — Quadratic Functions
For the graph y = -x² + 2x + 3, find (ii) the maximum value of the graph.
- A. 1
- B. 3
- C. -1
- D. 4
Verified working — step 1
The turning point is at x = -b2a = -22×-1= 1. Then y = -(1)² + 2(1) + 3 = …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.
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