ECZ 2014 · O-Level Paper 1 — Quadratic Equations
Solve the equation 2(x − 2)2 = 18.
- A. x = 5 or x = −1
- B. x = 5 or x = 1
- C. x = 3 or x = −3
- D. x = 11 or x = −7
Verified working — step 1
Peel the equation from the outside in: divide by 2, then square-root - remembering BOTH roots.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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