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

Last Updated: 20.06.2025 01:15

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

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

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What was it like being spanked as a kid?

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

Why do liberals think same-sex marriage is alright? The Bible makes it very clear that it's not alright to be gay, why can't liberals understand that?

Move the nub up to the top:

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

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

Does the Lil Wayne song ‘Lollipop’ refers to a Lollipop sweet or a metaphor?

n^2 - n + n - 1

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

Do older women know what they want?

(n - 1)(n + 1)

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Why is Donald Trump criticized by so many people?

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