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- HSN-CN.C.7Solve quadratic equations with real coefficients that have complex solutions.
- HSN-CN.C.8(+) Extend polynomial identities to the complex numbers. For example, rewrite x<sup>2</sup> + 4 as (x + 2i)(x â 2i).
- HSN-CN.C.9(+) Know the Fundamental Theorem of Algebra; show that it is true for quadratic polynomials.

Complex Number Battleship

Algebra II

Â» Unit:

Games

Big Idea:Use games like this to fill those odd days before break or during homecoming week with meaningful mathematical activities or use for fun review!

Polynomial and Rational Functions: Unit Assessment

12th Grade Math

Â» Unit:

Polynomial and Rational Functions

Big Idea:Assess students' understanding of polynomial and rational functions.

Complex Solutions to Quadratic Equations

Algebra II

Â» Unit:

The Complex Number System

Big Idea:Students investigate the geometry of the complex solutions to a quadratic equation in a dynamic setting.

Complex Solutions of Quadratics

Algebra II

Â» Unit:

Imagine This! Imaginary and Complex Numbers

Big Idea:Why re-TEACH quadratics when you can re-THINK them in this lesson?!

Indentify That!

Algebra II

Â» Unit:

Complex Numbers

Big Idea:Identities can be complex and confusing...this lesson helps your students make sense of polynomial identities and complex numbers!

Rational Functions and Inequalities Formative Assessment

12th Grade Math

Â» Unit:

Polynomial and Rational Functions

Big Idea:Use a Quick Quiz to see if students understand rational functions and inequalities.

The Fundamental Theorem of Algebra - Day #1

Algebra II

Â» Unit:

Imagine This! Imaginary and Complex Numbers

Big Idea:Roll out and connect the Fundamental Theorem of Algebra to the students' prior knowledge and learning.

Unit Test

Algebra II

Â» Unit:

Imagine This! Imaginary and Complex Numbers

Big Idea:Students will persevere through a unit assessment by utilizing the skills they have acquired (MP1).

Complex Numbers Review

Algebra II

Â» Unit:

Complex Numbers

Big Idea:Students help design their own review outline focusing on what they need to study instead of cramming on everything!

Complex Numbers Assessment

Algebra II

Â» Unit:

Complex Numbers

Big Idea:This assessment is great practice for standardized tests like the ACT and SAT.

Unit Review

Algebra II

Â» Unit:

Imagine This! Imaginary and Complex Numbers

Big Idea:Collaborative Unit Review Strategies!

HSN-CN.C.7

Solve quadratic equations with real coefficients that have complex solutions.

HSN-CN.C.8

(+) Extend polynomial identities to the complex numbers. For example, rewrite x^{2} + 4 as (x + 2i)(x â 2i).

HSN-CN.C.9

(+) Know the Fundamental Theorem of Algebra; show that it is true for quadratic polynomials.