0580/22 May/Jun 2021, Question 20: Expand and Simplify
Cambridge IGCSE Mathematics 0580 · Paper 22 (Extended) · Calculator · 3 marks
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The question, in short
Expand and simplify the product of three brackets, (x − 2)(2x + 5)(x + 3), giving the result as a simplified polynomial.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 1(x − 2)(2x + 5) = 2x² + 5x − 4x − 10 = 2x² + x − 10
- 2(2x² + x − 10)(x + 3) = 2x³ + 6x² + x² + 3x − 10x − 30
- 3= 2x³ + 7x² − 7x − 30
Answer2x³ + 7x² − 7x − 30
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Also searched as: 0580/22/M/J/21 · 0580_s21_qp_22 · 0580 s21 22 · question 20.
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