Why is (n-1)(n+1)=n^2-1?
Last Updated: 27.06.2025 03:39

Move the nub up to the top:
n^2 - n + n - 1
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
Why did my ex-narcissist move so fast with his new supply marriage engagement moving in, etc.?
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xxx x
The basic answer is that you cross-multiply the values in each factor:
xxx
xxx x
And you are left with almost a square. One less than the square of side n.
Why has my ex moved on so fast after years of being together with me?
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xxxx
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
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n^2 - 1
xxx
(n - 1)(n + 1)
Private-sector firms added just 37,000 jobs in May, the lowest total in more than two years - CNN
So, that’s a rectangle with sides 2 and 4.