Addition and subtraction of polynomials - Watch video (Algebra II)

Algebra II: Addition and subtraction of polynomials

This is a free lesson from our course in Algebra II


	This lesson introduces basic concepts about polynomial operations like addition and subtraction. Just take a look at the presentation including some examples explained by the instructor with the help of video, and in own handwriting and you'll realize how incredibly simple Polynomial operations are. Addition and substraction are two of the most common operation with polynomials. The result of any sum, or difference of two (or more) polynomials is also a polynomial. (More text below video...)

Other useful lessons:

Multiplication of polynomials

Polynomial long division

(Continued from above) Addition and subtraction of polynomials is simply the adding and subtracting of the like terms.
� to add two polynomials, combine their like terms.
� to subtract one polynomial from another, change the subtraction sign to an addition sign and change the signs of all the terms in the polynomial being subtracted (don't forget to change the sign of the first term). Then add the resultant polynomial by combining like terms.
For example,
Addition of two polynomials:
(x² + 2x - 17) + (2x² + x + 3)
Adding like terms,
=> (x² + 2x²) + (2x + x) + (-17 + 3) gives,
(3x² + 3x - 14).
Subtraction of two polynomials:
(3x² + 2x - 17) - (2x² + x + 3)
Subtracting like terms,
=> (3x² - 2x²) + (2x - x) + (-17 - 3)gives,
(x² + x - 20).

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