4024/21 Oct/Nov 2025, Question 24: Expanding triple brackets
Cambridge O Level Mathematics 4024 · Paper 21 (Calculator) · Calculator · 3 marks
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The question, in short
Multiply out and simplify (x − 1)(x + 3)(3x − 4).
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 1(x − 1)(x + 3) = x² + 2x − 3
- 2(x² + 2x − 3)(3x − 4) = 3x³ − 4x² + 6x² − 8x − 9x + 12
- 3= 3x³ + 2x² − 17x + 12
Answer3x³ + 2x² − 17x + 12
Stuck on a step? Read the free lesson: Expand and Simplify
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Also searched as: 4024/21/O/N/25 · 4024_w25_qp_21 · 4024 w25 21 · question 24.
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