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

14.06.2025 04:31

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

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Move the nub up to the top:

Why does Christianity push reconciliation after a partner cheats? Mine had a 7-year affair with someone half my age. He cheated and lied. He is not the same to me.

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

Is Melania still angry that she failed as a model? Why is she so cold and hostile? Why did she blame everyone for her actions in her trite book?

(n - 1)(n + 1)

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

n^2 - n + n - 1

Why do wokes use words like "homophobes" when they don't know what that means? Do they realize that no one is afraid of them?

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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

From 1 to 10, how dark is the Naruto fandom? Why?

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

n^2 - 1

Pope Leo XIV Dons White Sox Hat During Public General Audience in Vatican - Sports Illustrated

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