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# Quadratic Formula and Complex Sums

## Conversion between a + bi and (a, b), (r, theta), and rcistheta.

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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## Solving Quadratic Equations with Complex Number Solutions

This lesson covers solving quadratic equations when the answers are complex numbers.

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## Complex Roots of Quadratic Functions

This concept explores finding roots of quadratic functions when the roots are complex roots.

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## Solving Quadratic Equations with Complex Number Solutions - Using Square Roots

This lesson covers solving quadratic equations when the answers are complex numbers.

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## Complex Number Solutions

by EPISD Algebra 2 Team //at grade

This lesson covers solving quadratic equations when the answers are complex numbers.

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• PLIX

## Quadratic Formula and Complex Sums: Vertical and Horizontal Shift 2

Quadratic Formula and Complex Sums Interactive

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• PLIX

## Quadratic Formula and Complex Sums: Vertical and Horizontal Shift

Quadratic Formula and Complex Sums Interactive

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• Video

by CK-12 //basic

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• Video

## Adding and Subtracting Complex Numbers

Provides examples of how to add and subtract complex numbers.

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• Video

## Operations - Overview

by CK-12 //basic

Overview

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• Video

## Complex Solutions of a Quadratic Equation - Overview

by CK-12 //basic

Overview

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• Video

## Operations - Example 1

by CK-12 //basic

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• Video

## Operations - Example 2

by CK-12 //basic

Multiplying Complex Numbers

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• Practice
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## Solving Quadratic Equations with Complex Number Solutions KWL Table

To activate prior knowledge, to generate questions about a given topic, and to organize knowledge using a KWL Chart.

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• Study Guide

## Imaginary and Complex Numbers

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

Add, subtract, multiply, and divide complex numbers, as well as identify complex roots of quadratic functions.

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• Flashcards

## Solving Quadratic Equations with Complex Number Solutions

by Kyle Bardman //basic

These flashcards will help you to better understand Algebra II with Trigonometry Concepts.

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