https://en.wikipedia.org/wiki/Imaginary_number

An imaginary number is a complex number that can be written as a real number multiplied by ... Geometrically, imaginary numbers are found on the vertical axis of the complex number plane, allowing them to be presented perpendicular to the  ...

https://en.wikipedia.org/wiki/Complex_number

A complex number is a number that can be expressed in the form a + bi, where a and b are real .... A purely imaginary number bi is a complex number 0 + bi whose real part is zero. ..... the roots of cubic and quartic polynomials were discovered by Italian mathematicians (see Niccolò Fontana Tartaglia, Gerolamo Cardano).

http://rossroessler.tripod.com/

Eventually, though, a section of numbers called “imaginary” was created ... 3rd and 4th degree polynomial equations were discovered, and people realized that  ...

https://www.mathsisfun.com/numbers/imaginary-numbers.html

An Imaginary Number, when squared, gives a negative result. ... But then people researched them more and discovered they were actually useful and important ...

https://www.quora.com/Who-discovered-imaginary-numbers

The first use or effort of using imaginary number[1] dates back to AD. Heron of Alexandria[2] , while studying the volume of an impossible ...

https://www.khanacademy.org/math/algebra2/introduction-to-complex-numbers-algebra-2/the-imaginary-numbers-algebra-2/v/introduction-to-i-and-imaginary-numbers

Sal introduces the imaginary unit i, which is defined by the equation i^2=-1. ... Interesting how an imaginary number raised to the power of an imaginary number ..... Some of its digits can be found here: http://apod.nasa.gov/htmltest/ gifcity/e.2mil

https://www.khanacademy.org/math/algebra2/introduction-to-complex-numbers-algebra-2/the-imaginary-numbers-algebra-2/a/intro-to-the-imaginary-numbers

Learn about the imaginary unit i, about the imaginary numbers, and about square roots of negative numbers.

http://www.math.uri.edu/~merino/spring06/mth562/ShortHistoryComplexNumbers2006.pdf

notes track the development of complex numbers in history, and give evidence that supports the .... on the Geometrical Interpretation of Imaginary Quantities”. ... He found. Legendre's letter describing Argand's mathematical results, but ...

https://medium.com/i-math/imaginary-numbers-explained-e5aa63bdb7ae

Jul 26, 2017 ... We were talking about number systems when I mentioned the imaginary numbers and she burst into laughter. “What's so funny?” “Imaginary ...

https://betterexplained.com/articles/a-visual-intuitive-guide-to-imaginary-numbers/

We'll approach imaginary numbers by observing its ancestor, the negatives. ... Even Euler, the genius who discovered e and much more, didn't understand ...