ECZ 2018 · GCE Paper 1 — Algebra
Factorise completely 5x² − 5.
- A. 5(x² − 1)
- B. (5x − 5)(x + 1)
- C. 5(x − 1)²
- D. 5(x − 1)(x + 1)
Verified working — step 1
Take out the common factor first: 5x² − 5 = 5(x² − 1). Then recognise x² − 1 as a difference of two squares: x² − 1 = …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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