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Kquorans, can you please write a story?

⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀羊が一匹闇の中全部切り裂いていけ I don’t believe in lighthearted people; I don’t...

Why is (n-1)(n+1)=n^2-1?

The basic answer is that you cross-multiply the values in each factor: (n - 1)(n + 1) n^2 - n + n -...