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

Last Updated: 18.06.2025 09:17

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

(n - 1)(n + 1)

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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

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

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Do interviewers discriminate against a candidate if he or she is overweight (assuming physical fitness is NOT part of the job requirements)?

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n^2 - n + n - 1

When was the first time you felt discriminated against because you were female?

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

Move the nub up to the top:

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What is the gayest experience you have seen in prison?

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

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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

I can not sleep. what is the problem?

n^2 - 1