the "imaginary number" i is the square root of negative one.
If you imagine the numbers from -10 to 10 in a line i would sit above 0.
It's use gives us a second dimension of numbers, all normal numbers are the x axis, all imaginary are the y axis.
(PsychoChomp, Fri 3 Dec 2010, 12:09, 1 reply, 15 years ago)

I think you mean negative rather than number in the first line

(Bazongaloid, Fri 3 Dec 2010, 12:10, Reply)

Nope...
en.wikipedia.org/wiki/Imaginary_number
(PsychoChomp, Fri 3 Dec 2010, 12:12, Reply)

Errr, yes.
i is the square root of a negative number, the square root of the number 1 is 1, the square root of negtive 1 is i.
(Bazongaloid, Fri 3 Dec 2010, 12:15, Reply)

Oh yeah I was looking at the wrong number.
shut up I'm hungover.
(PsychoChomp, Fri 3 Dec 2010, 12:16, Reply)