Logo

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

12.06.2025 00:53

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

xxxx

(n - 1)(n + 1)

n^2 - n + n - 1

Why do certain religions consider menstruating women to be impure? Where did the concept of impurity stem from?

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

xxx x

xx

Can you share a picture of your favorite outfit and explain why you love it?

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 - 1

xxx

Texas woman dies from brain-eating amoeba after cleaning sinuses with tap water - NBC News

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

xxx x

xxx

Chairman Comer Subpoenas Dr. O’Connor Over Cover-Up Of Biden’s Mental Decline - United States House Committee on Oversight and Accountability - (.gov)

xxxx

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

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

Attenborough's Ocean a Brutal, Beautiful Wake-up Call - Newser

Move the nub up to the top: