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

12.06.2025 01:07

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

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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

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.

n^2 - n + n - 1

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What are some reasons for the widespread dislike of President Trump? In your opinion, has he been a good or bad president?

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(n - 1)(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

Democrat voters, why are you so naive, easy to manipulate, can't see a liar standing right in front of you and why won't you research your party? You will find they have a plan for all W. Nations and it's evil.

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

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

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What do you think, TikTok is nothing but another porn site? Do you agree or not? Why?

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n^2 - 1