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

Last Updated: 17.06.2025 08:41

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

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n^2 - n + n - 1

n^2 - 1

Does the pro-choice movement realise that all the money used to subside abortions can be used to subsidize daycare and other financial support for single mothers with unplanned pregnancies?

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Why do some young mothers trick a guy into believing that they're pregnant and it's their child when years later they find out that it's not even theirs should he still pay child support or not?

Move the nub up to the top:

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

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

(n - 1)(n + 1)

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I'm a 28-year-old guy who has never been in a relationship, nor can I seem to find someone who wants to be in one with me. Why do I feel like a freak?

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

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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