2025 NASS PRELIMS P1 Q7

2025 NASS PRELIMS P1 Q7

Secondary 4
4 marks
  1. Expand and simplify \(-(5x-2y)(-3x+4y)\).[2]
  2. Factorise completely \(9ab-12ac+28bc-21b^2\).[2]

Solution:

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Answer:(a) \(15x^2-26xy+8y^2\) (b) \((3b-4c)(3a-7b)\)

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