Videos, solutions, and lessons to help High School students learn how to extend polynomial identities to the complex numbers. For example, rewrite x

Common Core: HSN-CN.C.8

Related Topics:

Common Core (The Complex Number System)

Common Core for Mathematics

Factor Expressions Using Complex Numbers

How to factor expressions using complex numbers.

Starting with a third-degree polynomial with one known complex zero, how can you find the other zeros? This video explores three interesting options, utilizing polynomial division, synthetic division, the quadratic formula, and square roots of complex numbers.

This video shows that if we know a complex root, we can use that to find another complex root using the conjugate pair theorem.

The Conjugate Pair Theorem - Example 2. In this video, I factor a 3rd degree polynomial completely given one known complex root.

Real and Complex Polynomial Roots

Polynomial Roots- Real and Complex: This tutorial will teach you how to solve polynomials with complex roots. You will learn Descartes' rule of signs, the fundamental theorem of algebra and the conjugate pairs theorem.

This video provides an example of how to find the zeros of a degree 3 polynomial function with the help of a graph of the function. The function has 1 real rational zero and 2 imaginary.

This video provides an example of how to find the zeros of a degree 3 polynomial function with the help of a graph of the function. The function has 1 real rational zero and 2 complex zeros.

This video provides an example of how to find the zeros of a degree 4 polynomial function with the help of a graph of the function. The function has 2 real rational zero and 2 complex zeros.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.