Logo

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

11.06.2025 08:05

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

xxx x

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

(n - 1)(n + 1)

PWHL SEATTLE SIGNS HILARY KNIGHT TO ONE-YEAR CONTRACT | PWHL - Professional Women's Hockey League - PWHL

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

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

xxx x

World's Most Famous Waltz to Be Beamed into Space on Composer 200th Birthday, and EU Space Agency's 50th - Good News Network

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

xxxx

xxx

If a narcissist can't feel remorse, can they ever feel regret for an evil act after going to rehab?

n^2 - n + n - 1

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

xxx

What if Supergirl was a baby and not a teenager when she left Krypton? Who do you think will find her? What do you think things would be like?

Move the nub up to the top:

n^2 - 1

xx

Not just genes: After 17 years of study, scientist discovers just 1 lifestyle change that could easily ad - Times of India

xxxx