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

Last Updated: 18.06.2025 05:54

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

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

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n^2 - 1

Do narcissists love their children?

Move the nub up to the top:

(n - 1)(n + 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

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.

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

My ex got into a relationship within 2 weeks after a breakup. What should I do?

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n^2 - n + n - 1

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

My parents force me (15yo atheist) to go to church, and there’s this thing called Small Sundays where we discuss the Bible in groups, there are questions asked about the Bible. What am I supposed to do when they ask?

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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

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Are there any more 'nun' jokes?

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