Logo

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

10.06.2025 08:25

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

n^2 - n + n - 1

xxx x

Move the nub up to the top:

What is the reason behind some people referring to themselves as "nice guys" instead of simply being nice?

xxx x

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

xxx

Liverpool FC parade crash injured rises to 109 - BBC

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

xxx

I broke up with my boyfriend because he wasn’t transparent about his past, it hurts me and he doesn’t care. I told him in the beginning of our relationship that it was a deal breaker for me what do I do?

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

(n - 1)(n + 1)

xxxx

Where should Jac Caglianone hit in the Royals order? - Royals Review

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

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

xx

A child had measles at Mall of America, concerning state health officials who don’t know source - Star Tribune

xxxx