4024/12 May/Jun 2020, Question 7: Factorising by Grouping
Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 2 marks
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The question, in short
Factorise the four-term expression 15a − 5x − 2xy + 6ay completely.
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Solution · 2 marks
- 115a − 5x + 6ay − 2xy
- 2= 5(3a − x) + 2y(3a − x)
- 3= (5 + 2y)(3a − x)
Answer(5 + 2y)(3a − x)
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