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

Last Updated: 28.06.2025 02:06

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

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Move the nub up to the top:

n^2 - n + n - 1

Why do I sweat so much at the gym?

n^2 - 1

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

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When a black man and a white woman have a child, does the child become white? If a white man and a black woman have a child, does the child become black?

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

What's the deal with black women who wear straight hair or go bald?

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

Rich people actually spend a whole lot, but the market is the market and there is only one price for the same item and it is much easier for the rich to buy it or lease it or rent it because its expensive to be poor. So why do people have such ideas?

If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2

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Could humans be selectively bred, like dogs, to create 2 subspecies that can no longer have offspring? Do I not understand selective breeding properly? Im not worried about the moral implications, just the science please.

(n - 1)(n + 1)