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

Last Updated: 20.06.2025 15:10

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

(n - 1)(n + 1)

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Did the Sumerians, Babylonians and, other Mesopotamians create more, influence more and, were more advanced than Egypt?

n^2 - 1

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Which media outlet gave Starmer and his band of failures the most support during the election? Now we can punish them for it.?

Move the nub up to the top:

The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2

The basic answer is that you cross-multiply the values in each factor:

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n^2 - n + n - 1

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So, that’s a rectangle with sides 2 and 4.

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If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2

I haven’t eaten junk food for weeks, I ate dirty all-day yesterday, but I can’t even workout, why am I so tired?

And you are left with almost a square. One less than the square of side n.