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This video continues looking at dividing complex numbers by looking at the conjugate of a complex number. The instructor then uses the conjugate to rationalize the denominator of a rational expression with a complex number in the...
In this video, a complex number is defined and graphed on the complex plane. Sal also shows how to add, subtract, and multiply two complex numbers. He starts showing how to divide two complex numbers, but runs out of time and continues...
Students are always fascinated by imaginary numbers. In this video, Sal defines the imaginary unit, i, and shows when raising i to an exponent it has a cyclic nature.

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### We found 136 resources with the concept complex numbers

Videos (Over 2 Million Educational Videos Available)

10:23

Algebra 50 - Three Variable Systems in the...

3:11

Defining Gravity

2:45

Population Genetics

Other Resource Types
(136)

Lesson Planet: Curated OER

#### Flipped Math: Common Core Algebra 2

Algebra 2 pupils will flip over a 13-unit course that addresses Common Core standards designed for out-of-class learning. The first-semester unit covers polynomials, polynomial functions, radicals, transformations of functions, and...

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#### Common Core Algebra 2, Unit 6: Complex Numbers

Three lessons and a review make up Unit 6: Complex Numbers in the Common Core Algebra II series. Designed for the flipped classroom, topics covered are Imaginary Numbers, Complex Numbers, and the Quadratic Formula. Videos explain to the...

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#### Quiz 2: Types of Functions

Here is a resource that provides the structure of an assessment with the convenience of a full answer key. The focus is on rational, exponential, and logarithm functions with a few questions on solving polynomials.Â

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#### Quiz 1: Types of Functions

Sometimes the best things are already done for you! Here is a six-problem quiz that has a variety of problems ranging from solving quadratic equations to interpreting a function. The piece-de-resistance is the worked out answer key in...

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#### Complex Number Maze

This is a to-the-point complex number skills learning exerciseÂ with a fun addition of completing a maze. Learners solve problems to determine if answers are imaginary or not, in order to work their way through the maze. AnÂ average level...

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#### Vectors

Complex numbers bridge so many concepts as learners edge into higher-level math. Here, theirÂ polar and rectangular forms link throughÂ vector notation, and the arithmetic of vectors is born. These basic math skills translate into a...

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#### Quadratic Equations

Through a variety of physical and theoretical situations, learners are led through the development of some of the deepest concepts in high school mathematics. Complex numbers, the fundamental theorem of algebra and rational exponents...

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#### Complex Numbers (Part 2)

This video continues looking at dividing complex numbers by looking at the conjugate of a complex number. The instructor then uses the conjugate to rationalize the denominator of a rational expression with a complex number in the...

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#### Exponential Form to Find Complex Roots

Sal solves the problem x^3 = 1 for all of the real and complex roots using the exponential form of the complex number. He shows how the roots found in exponential form are the same as those in a more traditional form of a complex number...

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#### Complex Numbers (Part 1)

In this video, a complex number is defined and graphed on the complex plane. Sal also shows how to add, subtract, and multiply two complex numbers. He starts showing how to divide two complex numbers, but runs out of time and continues...

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#### Complex Determinant Example

Sal solves a complex determinant problem from the 2010 IIT entrance test. Knowledge of determinants, the exponential form of complex numbers, trigonometric ratios, and algebraic thinking are all utilized here.

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#### Complex Conjugates

Sal discusses the usefulness of the conjugate of the complex number is this video. First, he shows both graphically and algebraically adding a complex number and its conjugate. Then, he shows how to simplify a rational expression with...

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#### Basic Complex Analysis

This video gives an excellent overview of the different representations of a complex number. First, Sal reviews a pictorial representation of a complex number as an Argand diagram, then shows how to find the modulus and the argument of a...

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#### Introduction to I and Imaginary numbers

Students are always fascinated by imaginary numbers. In this video, Sal defines the imaginary unit, i, and shows when raising i to an exponent it has a cyclic nature.

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#### Complex Numbers (Part 2)

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#### Complex Numbers (Part 1)

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#### Introduction to I and Imaginary numbers

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#### Unit 6 Review: Complex Numbers

Complex numbers don't have to live up to their name. The final lesson in the unit is a review of concepts related to imaginary and complex numbers. Items include review of operations with imaginary numbers and solving quadratic equations...

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#### Quadratic Formula

The quadratic formula is what worksâ€”always. Instruct your classes on the application of the quadratic formula using a thorough video lesson followed by provided practice problems. The lesson connects algebraic solutions to graphical...

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#### Complex Numbers

Simplify the complex with a thorough video lesson. Individuals view a lesson on complex numbers and then use a provided set of practice problems to show what they've learned. The lesson includes instruction on using the four basic...

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#### Imaginary Numbers

Leave nothing to the imagination! Learners view a thorough lesson on imaginary numbers that introduces the concept, shows how to simplify square roots of negative numbers, and then how to solve quadratic equations with imaginary...

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#### College Algebra

Is there more to college algebra than this? Even though the eBook is designed for a college algebra course, there are several topics that align to Algebra II or Pre-calculus courses. Topics begin with linear equation and inequalities,...

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#### Precalculus

Take a step beyond Algebra 2. Learners use the eBook to learn concepts from the typical Precalculus course. Content starts off with a short review of functions in general and moves on to the basic functions, finishing up with more...

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#### Algebra and Trigonometry

Move on into trigonometry. An informative eBook takes the content of a College Algebra course and adds more relating to trigonometry and trigonometric functions. The content organization allows pupils to build upon their learning by...