0580/11 May/Jun 2024, Question 16: Expand and Simplify
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 3 marks
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The question, in short
A rectangle has length 3x − 12 and width x + 7. Work out a simplified expression for its perimeter.
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Solution · 3 marks
- 1Perimeter = 2(x + 7) + 2(3x − 12)
- 2= 2x + 14 + 6x − 24
- 3= 8x − 10
Answer8x − 10 or 2(4x − 5)
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