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
Divide by 2: (x − 2)² = 9. Take square roots: x − 2 = ±3, so x = 5 or x = …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