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

12.06.2025 01:26

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

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Do women lack the mental strength to succeed at STEM? There seems to be few women at STEM and more women leave STEM after a time of working at it. How can it be just sexism if women aren't banned from entering?

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

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What are the most significant instances of romantic jealousy in the Harry Potter series?

(n - 1)(n + 1)

Move the nub up to the top:

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Libtards argue Obama deported more people than Trump, but if that were true why weren't they comparing Obama to Idi Amin?

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

n^2 - 1

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

If Trump were to lose in 2024, would that be the end of his grip on the Republican Party?

n^2 - n + n - 1

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

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Do you think a lot of sociopaths' parents kill themselves for having brought such disgusting evil into the world? How much shame and disgust must they carry?

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