0580/22 Feb/Mar 2022, Question 9: Simple Factorising
Cambridge IGCSE Mathematics 0580 · Paper 22 (Extended) · Calculator · 2 marks
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The question, in short
Factorise the expression 12a³ − 21a completely.
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Solution · 2 marks
- 1HCF of 12a³ and 21a is 3a
- 212a³ − 21a = 3a(4a² − 7)
Answer3a(4a² − 7)
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