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

13.06.2025 09:30

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

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n^2 - 1

I am skinny, I have been doing 100 pushups a day for more than a month and am seeing very few results, everything is so unfair, I workout more than anyone I know and am still skinny, why cant I build muscle?

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

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

According to the Gita, how do I abandon fruits of my karma? Should I donate my whole salary and stay hungry?

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

Move the nub up to the top:

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

Fewer than 500 neurons are associated with the suppression of binge drinking, new research finds - Medical Xpress

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

n^2 - n + n - 1

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(n - 1)(n + 1)

Why don’t people want the American Dream anymore - marriage, kids, a dog, and the white picket fence?

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