2025 SST PRELIMS P1 Q4

2025 SST PRELIMS P1 Q4

Secondary 4
6 marks
  1. Solve \(x^2-4x-11=0\) by completing the square. Give your answers correct to 2 decimal places.[3]
    1. Factorise completely \(4x^2+5x-6\).[1]
    2. Hence, factorise completely \(4(2t+2)^2+5(2t+2)-6\). Write your answer as simply as possible.[2]

Solution:

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Answer:(a) \(x=5.87\) or \(-1.87\) (b)(i) \((4x-3)(x+2)\) (ii) \(2(8t+5)(t+2)\)

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