ECZ 2018 · GCE Paper 1 — Quadratic Equations
Solve the equation (2x − 1)2 = 25.
- A. x = 3 only
- B. x = −2 or x = 3
- C. x = −3 or x = 2
- D. x = 13 or x = −12
Verified working — step 1
Square-root both sides - remembering that BOTH 5 and -5 square to 25 - and each case gives its own solution.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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