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

Last Updated: 17.06.2025 12:00

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

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n^2 - n + n - 1

What are some very specific groups of people you just cannot stand?

(n - 1)(n + 1)

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

What are some common historical misconceptions?

n^2 - 1

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Do you think that drug addiction is a symptom of larger societal ills? What is it about our culture that leaves so many feeling like they're inadequate, trying any ill to find a cure?

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

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Who are the main characters of Family Guy, American Dad, and King of the Hill? Who are the recurring characters of family guy, American dad, and king of the hill? What changes will be made in all 3 shows?

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Move the nub up to the top:

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

Why do people who were very kind and loving once become cold-hearted?

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