ECZ 2021 · GCE Paper 1 — Quadratic Functions
The diagram shows a sketch of the graph of y = 5 − 4x − x2, cutting the x-axis at A and B. Find the coordinates of the points A and B.
- A. A(−5, 0), B(1, 0)
- B. A(−1, 0), B(5, 0)
- C. A(−5, 0), B(−1, 0)
- D. A(0, −5), B(0, 1)
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.
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