0580/21 May/Jun 2026, Question 3: Substitution
Cambridge IGCSE Mathematics 0580 · Paper 21 (Extended) · Non-calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Work out the value of 4x² + 3y by substituting x = 5 and y = 10.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 14 × 5² = 4 × 25 = 100
- 23 × 10 = 30
- 3100 + 30 = 130
Answer130
Stuck on a step? Read the free lesson: Substitution
Practise more substitution questions
Real 0580 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on substitution
Also searched as: 0580/21/M/J/26 · 0580_s26_qp_21 · 0580 s26 21 · question 3.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.