Khan Academy: Adding Polynomials

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.

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...

Sal simplifies (4x^2y - 3x^2 - 2y) + (8xy - 3x^2 + 2x^2y + 4).

Video demonstrates how to write a polynomial that represents the difference between the area of a rectangle of given length and width and the area of a circle with a given diameter. [4:37]

Demonstrates how to write a polynomial expression for a given situation. [1:24]

Sal simplifies (5x^2 + 8x - 3) + (2x^2 - 7x + 13x).

An old video where Sal adds (5x^2+8x-3) + (2x^2 - 7x + 13x).

Video lesson using a Maclaurin series to approximate a sine function by using a polynomial function. Generalizes the expansion of sine using sigma notation and relates it to the expansion for cosine. [9:24]

Video lesson finishing the derivation of the formula for the Maclaurin series and then applying it to find the polynomial approximation for e^x. [10:09]

Video continues a discussion about the relationship between the polynomial approximations for the sine, cosine and e^x functions from Maclaurin series and uses those to derive Euler's formula and Euler's identity. [10:18]