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Complex number  Wikipedia
A complex number is a number of the form a + bi, where a and b are real numbers and i is an indeterminate satisfying i 2 = −1.For example, 2 + 3i is a complex number. A complex number may therefore be defined as a polynomial in the single indeterminate i, with the relation i 2 + 1 = 0 imposed. From this definition, complex numbers can be added or multiplied, using the addition and ...
Complex Numbers, Defined, with examples and practice problems
What are complex numbers? A complex number can be written in the form a + bi where a and b are real numbers (including 0) and i is an imaginary number.. Therefore a complex number contains two 'parts': one that is real; and another part that is imaginary
Complex Numbers: Introduction  Purplemath
Introduces the imaginary number 'i', and demonstrates how to simplify expressions involving the square roots of negative numbers. Warns about a common trick question.
Imaginary number  Wikipedia
An imaginary number is a complex number that can be written as a real number multiplied by the imaginary unit i, which is defined by its property i 2 = −1. The square of an imaginary number bi is −b 2.For example, 5i is an imaginary number, and its square is −25.Zero is considered to be both real and imaginary. Originally coined in the 17th century as a derogatory term and regarded as ...
Complex numbers  Clark University
This is an introduction to complex numbers. It includes the mathematics and a little bit of history as well. It is intended for a general audience.
IXL  Introduction to complex numbers (Algebra 2 practice)
Improve your math knowledge with free questions in "Introduction to complex numbers" and thousands of other math skills.
IXL  Add and subtract complex numbers (Algebra 2 practice)
Improve your math knowledge with free questions in "Add and subtract complex numbers" and thousands of other math skills.
Complex Numbers  MATLAB & Simulink
Real and imaginary components, phase angles. Mouseover text to see original. Click the button below to return to the English version of the page.
Dividing complex numbers (video)  Khan Academy
Sal divides (6+3i) by (75i). If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Complex Numbers in Excel  EngineerExcel
In some branches of engineering, it’s inevitable that you’re going to end up working with complex numbers. Fortunately, though, you don’t have to run to another piece of software to perform calculations with these numbers. There is builtin capability to work directly with complex numbers in Excel. How to Enable Complex Number Calculations in Excel…
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