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# Complex Numbers

## a + bi, the sum of a real and an imaginary number.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
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## Defining Complex Numbers

by Lya Snell //at grade
This lesson covers the powers of i, adding, and subtracting complex numbers.
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## Complex Numbers

by Jessica Schwartz //at grade
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## Complex Numbers

by Sathya TV //at grade
Definition of complex numbers and the complex number system, basic manipulation of complex numbers
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## Complex Numbers

by Kaitlyn Spong //at grade
Definition of complex numbers and the complex number system, basic manipulation of complex numbers
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## Defining Complex Numbers

by EPISD Algebra 2 Team //at grade
This lesson covers the powers of i, adding, and subtracting complex numbers.
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## SLT 5 Define a complex number and determine its relationship to the real number system.

by MCPS Math //at grade
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## Defining Complex Numbers

by Catherine Porter //at grade
This lesson covers the powers of i, adding, and subtracting complex numbers.
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## Defining Complex Numbers

by Jessica Haynes //at grade
This lesson covers the powers of i, adding, and subtracting complex numbers.
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## Extension: Defining Complex Numbers

by Deaniss Dean //at grade
This lesson covers the powers of i, adding, and subtracting complex numbers.
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## Define, Add and Subtract Complex Numbers

by Susan Sudberry //at grade
This lesson covers the powers of i, adding, and subtracting complex numbers.
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## Defining Complex Numbers (extension)

by The M-Team //at grade
This lesson covers the powers of i, adding, and subtracting complex numbers.
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• Study Guide

## Imaginary and Complex Numbers

by Rayna Schlossberg //at grade
Add, subtract, multiply, and divide complex numbers, as well as identify complex roots of quadratic functions.
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• Study Guide

## Imaginary and Complex Numbers

by Tabitha Nickerson //at grade
Add, subtract, multiply, and divide complex numbers, as well as identify complex roots of quadratic functions.
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