3 ms·
n² - 1 = (n - 1)(n + 1)
by pwdisswordfish 10y ago
n² - 1 = (n - 1)(n + 1)
- banku_brougham 10y agoprecisely. maybe its a trivial example, but if no mathematician had discovered the factorization of n^2 - 1, this visualization device would have been a helpful clue.