2025 SJI PRELIMS P1 Q21

2025 SJI PRELIMS P1 Q21

Secondary 4
5 marks
  1. Factorise completely \(2x^2-4xy-x+2y\).[2]
  2. Solve \(2x^2-8x=7\) by completing the square. Give your solutions correct to 2 decimal places.[3]

Solution:

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Answer:(a) \((x-2y)(2x-1)\) (b) \(x=4.74\) or \(-0.74\)

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