Logo

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

16.06.2025 09:36

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

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

n^2 - 1

xxx

Why do Muslims invade Western society?

xxx x

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

n^2 - n + n - 1

Mario Kart World 150cc Knockout Tour guide – how to easily win - Nintendo Everything

(n - 1)(n + 1)

xxxx

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

Is it possible for sisters to have different skin, hair colours, and hair types? E.g. hair= wavy, afro, straight, curly, black, brown, blonde, red. Skin colour: brown, peach, light brown and more.

xxxx

xxx x

Move the nub up to the top:

Why can't NASA just bite the bullet and launch a plainly simple mission, audited by flat earther peers start to finish that definitively proves to even the smallest minds that the earth is an oblong spheroid, and not flat?

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

xx

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 is the best sex you have ever had (in detail)?

xxx