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

13.06.2025 01:09

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

xxx

xxx

(n - 1)(n + 1)

Is it accurate to say that while Donald Trump has "America First" policy, the Democratic Party has "Other nations first" policy?

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

xxx x

Scientists Are Close to Replicating the First Living Thing - Yahoo

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

xxx x

xxxx

California schools are very liberal. Do you think California schools are teaching students to hate Republican views (views on: God, guns, prayer, secure borders, etc.)?

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

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

xxxx

Billy Joel Attempted Suicide Twice and Fell into a Coma After Affair with Friend's Wife. Why He Wanted to 'End It All' - Yahoo

n^2 - 1

Move the nub up to the top:

n^2 - n + n - 1

What makes Nigerian scammers skilled at impersonating people? Is their success a result of intelligence or other factors?

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