Virtual Nerd: What's a Prime Number?

What is a prime number? Is zero a prime number? Is one a prime number? No?! Is two a prime number? Yes. So what is the definition of a prime number? A prime number is a number that can only be divided by 1 and itself. Watch this short...

Working with a zero exponent makes an expression very easy to figure out, yet it comes with some special rules. Watch this tutorial for guidance when working with a zero exponent. [7:08]

In a prime polynomial, the only factors are 1 and itself. Learn all about prime polynomials by viewing this tutorial. [2:23]

This tutorial provides an introduction to the number line and shows you how to graph numbers on the number line in order to compare them. [5:48]

An irrational number is a number that cannot be written as a fraction. View this tutorial to see some examples and learn the definition and an important property of these special numbers. [2:06]

Real numbers are numbers that can be found on the number line and can be either a rational or irrational number. This tutorial explains real numbers and gives some examples. [2:57]

The instructor defines a prime polynomial as much the same as a prime number: they only have two factors, 1 and itself. She further demonstrates what a composite polynomial is to give an example of a polynomial that is not prime.

There are many different ways to solve a system of linear equations. In this tutorial, you'll see how to solve a system of linear equations by combining the equations together in order to eliminate one of the variables. Then, see how to...

Watch how exponents add when you divide the same number raised to different exponents. Reviewing the quotient of powers rule will help you on the SAT! [5:20]

Watch how exponents add when you multiply the same number raised to different exponents. Reviewing the product of powers rule will help you on the SAT! [4:30]