4MA1/1H Jan 2023, Question 13: Further Expansion
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1H (Higher) · Calculator · 3 marks
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The question, in short
Expand and simplify 3x(2x − 5)², showing clear algebraic working.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 1(2x − 5)² = (2x − 5)(2x − 5) = 4x² − 10x − 10x + 25
- 2Simplify: 4x² − 20x + 25
- 3Multiply by 3x: 3x(4x² − 20x + 25)
- 4= 12x³ − 60x² + 75x
Answer12x³ − 60x² + 75x
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