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

Last Updated: 26.06.2025 05:35

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

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Who are the actual "science deniers": people who wait until vaccines are proven effective, or people who believe that there are more than two genders?

n^2 - 1

n^2 - n + n - 1

Move the nub up to the top:

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(n - 1)(n + 1)

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Does any unofficial Roman Catholic card exist in the world to play? In Italy, Rome & the Vatican City, can practising Catholics get any discounts as a tourist, & / or privileged admission to certain sights, with different rules for non Catholics?

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

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

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

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

Why would Trump make conspiracy claims that Haitians are eating pets in Ohio?

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