ECZ 2020 · O-Level Paper 1 — Quadratic Functions
The diagram below shows the sketch of the graph of y = -x2 + 2x + 3 cutting the x-axis at A and B. Find the (i) coordinates of A.
- A. (3, 0)
- B. (0, 3)
- C. (-1, 0)
- D. (1, 0)
Verified working — step 1
A and B are the x-intercepts, where y = 0. Multiply through by -1 first so the x2 term is positive and easier to factorise.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