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Proof

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Question 22

Prove that (5n+3)2−(5n−3)2(5n + 3)^2 - (5n - 3)^2(5n+3)2−(5n−3)2 is always a multiple of 20, for all positive integer values of nnn.

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Proof Questions

  1. GCSE
  2. /Maths
  3. /Proof

56 exam-style questions on Edexcel GCSE Maths Proof. Each one has a worked solution and a mark scheme showing where the marks go.

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