Virtual Nerd: How Do You Subtract Complex Numbers?

This tutorial takes you through the process of multiplying two complex numbers together using the FOIL method. [2:45]

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,...

How do you simplify expressions that have negative exponents? This video will walk you through the process and provide examples. [3:39]

Line up your numbers! The instructor shows you how to line your numbers up by place value. Then step by step she subtracts each place value. She demonstrates how to borrow when the top value is less than the bottom value you are...

This video shows you how to distribute a whole number into fractions. [4:10]

Knowing how to find the Greatest Common Factor (GCF) is crucial to solving an equation or simplifying an expression. Review for the SAT by watching this tutorial that walks you through the process. [4:57]

This tutorial will show you how to multiply mixed fractions by first converting each to an improper fraction. [5:09]

This video tutorial shows how to divide mixed fractions by converting each to an improper fraction then multiplying by the reciprocal of the divisor. [5:45]

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.

To subtract polynomials, distribute the negative sign to the second polynomial and then combine like terms. Watch this tutorial to see how it's done. [2:07]