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

Last Updated: 17.06.2025 04:47

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

n^2 - 1

xxx x

(n - 1)(n + 1)

Do other British people agree that the UK should reconquer Ireland?

xxx

xxx

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

What are the reasons for people being banned from social media sites like Twitter and Instagram? Why is it considered a big deal?

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

xx

xxxx

I’m worried I have a bat bite on my hand, I have two small marks about 1 cm apart. I haven’t been in contact with a bat but I’m worried about at night. My fingers have a slight tingling sensation and my arm feels cold but isn’t. Am I ok?

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

xxxx

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

Is there anything wrong with me because I'm still single?

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

Move the nub up to the top:

xxx x

What is your opinion on the band Nickelback? Why do they receive criticism from some people?

n^2 - n + n - 1