Logo

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

12.06.2025 01:58

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

Move the nub up to the top:

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

xxxx

What are some signs that a therapist may have poor boundaries with their clients?

xx

xxx

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

Emotional David Andrews says he didn’t want to play for any team other than the Patriots - NBC Sports

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

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

xxxx

Star-shaped brain cells may underpin the brain's massive memory storage - Live Science

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

xxx x

xxx x

3 hours of sleep and no fatigue? Scientists uncover the secret of natural short sleepers - Times of India

n^2 - n + n - 1

xxx

n^2 - 1

Does Donald Trump have low self-esteem?

(n - 1)(n + 1)