Khan Academy: Algebra: Subtracting Polynomials With Multiple Variables

Sal beautifully explains how to subtract two polynomial expressions with multiple variables. He groups like terms and the distributive property to create a single expression.

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...

This video demonstrates how to subtract polynomials when there are multiple variables in each polynomial.

Video demonstrates how to identify the greatest common factor of a polynomial and use it to factor a given binomial. [5:28]

Video demonstrates how to use the factor by grouping method to factor a trinomial with a leading coefficient of 4. [5:38]

This video demonstrates how to evaluate an expression with two variables using substitution. [1:46]

Video demonstrates how to divide a trinomial of degree 3 by a trinomial of degree 2. Problem involves a remainder and multiplication is used to check the answer. Develops an understanding of polynomial division prior to an introduction...

Demonstrates how to find common denominators of rational expressions in order to subtract the given rational expressions. [5:35]

This video demonstrates how to solve a system comprised of three equations in three variables using elimination. [7:00]

Video finding the volume of a cube with sides that are an algebraic expression involving exponents. [2:31]