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Introduction to Complex Numbers

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More Lessons for Grade 9 Math
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Examples, videos, worksheets, solutions, and activities to help Grade 9 students learn what are complex numbers.

The following diagram shows that a complex number consists of a real part and an imaginary part. Scroll down the page for more examples and solutions.

Complex Number

What is a Complex Number?



Introduction to Complex Numbers
Complex Numbers: what they are, how to add and multiply them. Geometrical interpretation of multiplication.
Introduction to imaginary and complex numbers
Introduction to complex numbers

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


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