n n\,n is an integer.
Prove algebraically that the sum of (n+2)(n+1)(n + 2)(n + 1)(n+2)(n+1) and n+2n + 2n+2 is always a square number.
Practise Edexcel IGCSE Maths Proof with exam-style questions for IGCSE Maths. 14 questions, matched to the Edexcel IGCSE Maths (4MA1) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.