# Complex Numbers Teacher Resources

Find Complex Numbers lesson plans and worksheets

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**257**resources
EngageNY

#### Complex Numbers as Vectors

Show your math class how to use vectors in adding complex numbers. Vectors represent complex numbers as opposed to points in the coordinate plane. The class uses the geometric representation to add and subtract complex numbers and...

Thomson Brooks-Core

#### Complex Numbers

A straightforward approach to teaching complex numbers, this lesson addresses the concepts of complex numbers, polar coordinates, Euler's formula, De moivres Theorem, and more. It includes a practice problems set with odd answers and a...

EngageNY

#### An Appearance of Complex Numbers 1

Complex solutions are not always simple to find. In the fourth lesson plan of the unit, the class extends their understanding of complex numbers in order to solve and check the solutions to a rational equation presented in the first...

Illustrative Mathematics

#### Computations with Complex Numbers

This quick set of problems provides a brief refresher on the arithmetic of complex numbers. Learners need to multiply, add and subtract, and remember features of i when raised to a power. Included solutions are clear enough that learners...

Curated OER

#### How Do You Add Complex Numbers by Graphing in the Complex Plane?

Graphs usually add an extra dimension to ones understanding of mathematical concepts and graphing complex numbers is no exception. This video shows to graph complex numbers on the complex plane and what the results of adding complex...

Curated OER

#### How Do You Graph Complex Numbers?

Complex numbers have two parts and can be graphed on a complex plane. After an explanation of the complex plane, this video shows three examples of graphing complex numbers.

Curated OER

#### How Do You Multiply Complex Numbers Using FOIL?

How do you multiply complex numbers? The instructor in this video uses the FOIL method of multiplying binomials to multiply two complex numbers. She finishes the problem, by using prior knowledge of the definition of the imaginary unit,...

Flipped Math

#### 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...

Curated OER

#### 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...

Curated OER

#### Complex Numbers

In this complex numbers instructional activity, learners write numbers in standard form. They identify real, imaginary and complex numbers. Students find the absolute value and conjugate of a number. This two-page instructional...

EngageNY

#### Complex Number Division 1

Conjugating in the math classroom — and we're not talking verbs! The seventh lesson in a series of 32 introduces the class to the building blocks of complex number division. During the instruction, the class learns to find the...

Math eBook

#### Complex Numbers Addition Worksheet

In this complex numbers activity, learners find the sum of complex numbers. This four-page activity contains approximately 20 multi-step problems.

Curated OER

#### Complex Numbers

In this algebra worksheet, students simplify complex numbers ranging from performing basic operations to distribution with a few combine like terms. There are 44 questions.

Curated OER

#### Complex Numbers

Students examine complex numbers. In this Algebra II lesson, students investigate two programs that involve complex numbers: the MANDELER Program and SYNDIV program.

Curated OER

#### Complex Numbers

In this algebra worksheet, students solve complex numbers using multiplication and division properties. There are 10 questions with an answer key.

Curated OER

#### Complex Numbers

Curated OER

#### Complex Numbers

In this algebra worksheet, 11th graders solve complex numbers using division. multiplication, addition and subtraction. There are 11 questions with an answer key.

Welch Labs

#### Imaginary Numbers Are Real (Part 6: The Complex Plane)

How do addition and subtraction work on the complex plane? A short video presentation provides a clue on how to add complex numbers geometrically. The video ends with four problems to determine the rules for multiplication on the complex...

Welch Labs

#### Imaginary Numbers Are Real (Part 4: Bombelli's Solution)

Is the square root of negative one crucial to the process of finding other solutions? Using the properties of the newly discovered square root of negative one, historical mathematician Bobelli is able to solve Cardan's problem. His...

Ohio Department of Education

#### The Solution is Complex

Consider complex numbers, roots, and quadratic equations. Use the discriminate as a way to determine the nature of a quadratic's roots. Then discuss the similarities and differences between quadratics with two, one, or no real roots....

Curated OER

#### 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.

EngageNY

#### Complex Number Division 2

Individuals learn to divide and conquer complex numbers with a little help from moduli and conjugates. In the second instructional activity on complex number division, the class takes a closer look at the numerator and denominator of the...

EngageNY

#### The Geometric Effect of Some Complex Arithmetic 1

Translating complex numbers is as simple as adding 1, 2, 3. In the ninth lesson plan in a 32-part series, the class takes a deeper look at the geometric effect of adding and subtracting complex numbers. The resource leads pupils into...

EngageNY

#### The Geometric Effect of Some Complex Arithmetic 2

The 10th lesson in a series of 32, continues with the geometry of arithmetic of complex numbers focusing on multiplication. Class members find the effects of multiplying a complex number by a real number, an imaginary number, and another...

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