Khan Academy: Polynomials: Addition and Subtraction of Polynomials

While explaining how to add polynomial expressions with multiple variables, Sal uses academic vocabulary and a clear thinking process. This video is relatively short and would be appropriate for students working on homework or prepping...

Adding two polynomials begins with simplifying when possible. Sal demonstrates the process he uses to combine like terms and explains why the process works. This video would be great for those who need a quick refresher.

Use this video to build mathematical vocabulary through practical application. Sal breaks down the parts of a polynomial expression, identifying the coefficient and exponents while he defines them.

Some polynomials, when multiplied, result in a special product. Sal uses the distributive property to demonstrate the multiplication process. He then explains why some polynomials cannot be completely simplified.

To subtract two polynomials Sal demonstrates that you add the opposite of the second term, and then combine like terms to solve. How do you find an opposite term? Simply multiply the polynomial by -1. This video is very clearly explained...

Practice is an important learning tool. This practice problem allows students to apply their know-how to factoring a binomial with a difference of squares. Sal explains his process briefly, which makes this video appropriate for those...

Can you multiply a monomial by a polynomial? Yes you can, if you use the distributive property. Sal describes how to distribute the monomial term over the entire polynomial expression. He does a wonderful job explaining this concept.

Video defines what a polynomial is, identifies some different types of polynomials, explains how to determine the degree of a polynomial, shows how to add and subtract polynomials, and shows how to write polynomial expressions to...

Video showing how to add and subtract numbers using significant figures. Contrasts adding and subtracting with significant figures with multiplying and dividing. [8:59]

Video defining the addition rule for probability, including finding the probability of mutually exclusive events. [10:43]