Comment on The $13 Billion Mystery AngelsparentComments−tinco12yHow do you trivially construct `n^2-1 = (n+1).(n-1)` ? I feel like I'm failing at basic algebra here, but I don't see it.−pluies12y(n+1).(n-1) = n^2 - n + n - 1 = n^2 - 1
Comments
How do you trivially construct `n^2-1 = (n+1).(n-1)` ? I feel like I'm failing at basic algebra here, but I don't see it.
(n+1).(n-1) = n^2 - n + n - 1 = n^2 - 1