ECZ 2025 · O-Level Paper 1 — Quadratic Equations
Solve the equation (x − 1)2 − 25 = 0.
- A. x = 6 or x = −4
- B. x = 6
- C. x = 4
- D. x = 4 or x = −6
Verified working — step 1
Get the squared bracket alone, then square-root both sides - remembering that BOTH 5 and -5 square to 25.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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