

Imaginary Numbers


A number that when squared gives a negative result.
Now, if you square any Real Number you always get a positive, or zero, result. For example 2×2=4, and (2)×(2)=4 as well.
So how can we square a number and get a negative result? Because we "imagine" that we can … and it turns out that such a number, which may seem impossible, is actually useful and can solve real problems.
The "unit" imaginary numbers (the same as "1" for Real Numbers) is √(1) (the square root of minus one), and its symbol is i, or j.
See:
Real Number



