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

Last Updated: 17.06.2025 17:17

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

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

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n^2 - n + n - 1

Why are there so many single moms in America?

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

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Can you explain the ongoing conflict between Palestine and Israel? Why does it appear that Israel has been more successful in the conflict?

Move the nub up to the top:

n^2 - 1

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Why is India lagging behind China in economic development when India is a democracy while China isn’t?

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

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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 am so tired of ignorant people like you calling us far rights, why democrats is so educated, they take things from their own mouth, you guys are totalitarian party?

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(n - 1)(n + 1)

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Why are men ridiculously delusional in the women they want/approach? I'm not a troll. This is a real question. Why does a fat, pot bellied, unkempt, balding, stupid (ergo poor) man, tell a woman above his league that she isn't hot enough for him?

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