Once you know what a variable is, how do you use them? How to do add and subtract multiple variables? What does "polynomial" mean? In this series, we will practice fundamental Algebra 2 concepts, mostly focusing on polynomials and how to add, subtract, and multiply them together. This is the "Polynomial Arithmetic" unit of Khan Academy in Algebra 2. This series is focused on those who are currently taking Algebra and have questions, or those who simply want to know what's ahead, and even those who need a refresher! Feel free to check the Khan Academy unit here: https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:poly-arithmetic