Logo

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

10.06.2025 02:37

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

n^2 - n + n - 1

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

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

Why do good-looking men date homely women?

xxx

Move the nub up to the top:

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

What is your opinion on The Beatles' impact on modern popular music? Are there any other bands with similar impacts on their genre(s)? Why them and not others?

xxx x

n^2 - 1

xxxx

The International Boxing Association said that Khelif and Lin competing in Paris Olympics were disqualified from the tournament for testing positive for XY chromosomes which give an unfair advantage in the women’s division. What do you think?

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

(n - 1)(n + 1)

xxx

How did my ex move on very fast?

xxxx

xxx x

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

What should I do? I'm 17 and I'm dating a 23-year-old guy.

xx