If you divide 1 by 998,001 you get all three-digit numbers from 000 to 999 in order, except for 998.

✅ Follow @math

Each of the white circles are really just moving back and forth along a straight line.

✅ Follow @math

The equation 𝑥²=1 has two solutions.
They are 𝑥 = 1 and 𝑥 = -1.

We can see that if you substitute 1 in as 𝑥, 1² = 1. If instead you substitute -1 as 𝑥, (-1)² = (-1)*(-1) = 1.

In general, 𝑥² = a, where a is a positive real number, has solutions 𝑥 = √a and 𝑥 = -√a.

If a is not a positive number, or is not a real number, but rather a complex number, then we need to expand our horizons.

There will still be two answers, as with the positive number case.

✅ Follow @math

Multiplication Hack

✅ Follow @math

Which one is correct?

✅ Follow @math