GCSE Maths Revision: Proof (Grade 8) Topic Test [NEW 2023]

Lessons:

[jaybasi]

Hi sir, you know for question 4 how do you know that it's 2n^2 because at the start you said for square numbers that it is (n)^2+ (n+1)^2 So I went with that same approach and got an answer of 2(n^2+n)+1