Who is using the coroneos pink book for maths? (1 Viewer)

[Kujah]

It's called an imaginary number

Kujah, where are you up to in Fitzpatrick?

Um, I've nearly finished the Trigonometry and Polynomials chapters

 

[Lucid Scintilla]

I was told you can't do root minus 5 right now, but its part of the 4U course, and it is called unreal number. lol

Kujah, it's called a 'complex number'.
Root minus 5 = 2.236 i (3 dp).

 

[Kujah]

A complex unreal imaginary number

 

[Lucid Scintilla]

A complex unreal imaginary number

Nowadays, we just know it as complex, though.
Also, (-5)^(1/2) = 2.2360679774998 i
Not v. difficult when you think about it. Oh, and 5^(1/2) = same as above, just without 'i'.