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The square of any real number cannot be negative. However, there are equations whose solutions require the square root of negative numbers. The real number system was extended to the set of complex number to allow such operations. In some ways, this is analogous to the set of integers being extended to the set of rational numbers to allow division (when the denominator was not a factor of the numerator), or the set of rational numbers being extended to real numbers to allow square (and other) roots.

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9y ago

Complex numbers are used in electricity, in quantum mechanics, in art, and in several other areas. You can find a more complete list in the corresponding Wikipedia article.

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What is complex math?

Complex math covers how to do operations on complex numbers. Complex numbers include real numbers, imaginary numbers, and the combination of real+imaginary numbers.


What is the relation of complex numbers to real numbers?

Complex numbers are a proper superset of real numbers. That is to say, real numbers are a proper subset of complex numbers.


Could anyone list numbers not in the set of complex numbers?

No. Complex numbers is the highest set of numbers you can go, and there are no sets outside of complex numbers.


Set of real numbers and set of complex numbers are equivalent?

Real numbers are a proper subset of Complex numbers.


What year did Mr Kbh invent complex numbers?

Complex numbers were not invented by Mr KBH.


What are the kinds of complex numbers?

Complex numbers include real numbers, pure imaginary numbers, and the combination of those two.


Are complex numbers under addition and multiplication a field?

The complex numbers are a field.


Do the complex numbers for a group under binary operation ' plus '?

Yes, the complex numbers, as well as the real numbers which are a subset of the complex numbers, form groups under addition.


Which of these are complex numbers 5 3i 1 2i?

All of them. Real numbers are a subset of complex numbers.


How is a percent a real number?

It need not be. For example, a complex number as a percent of most other complex numbers, or any real number, will not be a real number.


What are set of complex number?

Complex numbers are numbers of the form (x + yi) where x and y are real numbers and i is the imaginary square root of -1. Any collection of such numbers is a set of complex numbers.


What mathematician introduced complex numbers?

Gerolamo Cardano is an Italian mathematician who introduced complex numbers. Complex numbers are those that can be expressed in the form of a+bi where a and b represent real numbers.