2026 PHS P1 Q6

2026 PHS P1 Q6

Secondary 4
6 marks
  1. Given that \(\sqrt[3]{8^k}=2^{3k}-2^{3k-1}\), find \(k\).[2]
  2. Factorise completely \(24mn-16m-42n+28\).[2]
  3. Expand and simplify \((5-3x)(2x^2+4x-1)\).[2]

Solution:

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Answer:(a) \(k=\dfrac12\) (b) \(2(3n-2)(4m-7)\) (c) \(-6x^3-2x^2+23x-5\)

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