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

09.06.2025 11:38

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

xxx x

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

DePaul soccer player Chase Stegall dies in residence hall - Chicago Sun-Times

n^2 - 1

xx

xxx

What does it mean when I have a dream where my friend died? I had this dream last night where one of my friends died in a shootout and I woke up crying.

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.

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

Why is my vagina swollen, it’s very itchy. I had sex we used protection, but day after it felt like my insides had a heartbeat as well as itching, the pulsing has went away but it is still itchy and my discharge is yellow, i'm 15, what could it be?

xxxx

(n - 1)(n + 1)

xxxx

CDC Health Advisory Says This 'Ongoing Risk' Leaves Travelers Vulnerable on Planes, Trains, Public Transport, and More - Travel + Leisure

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

xxx

Bond Yields Keeping Climbing. Governments Can Bring Them Down. - Barron's

n^2 - n + n - 1