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

13.06.2025 01:13

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

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

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

n^2 - 1

What are "demonic attacks" and how can one tell when they're happening to them, or someone else? How would one go about dealing with it?

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

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

(n - 1)(n + 1)

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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

Why are there posts saying the T in LGBT should be dropped? With what is happening in the US and beyond against the trans community cause for concern that if this is accepted could it be deemed acceptable to start on the LGB community again?

n^2 - n + n - 1

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Move the nub up to the top:

Why is my elder sister so mean?

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