Amsco Integrated Algebra I: Adding and Subtracting Algebraic Expressions
 This is a free lesson from our course in Amsco's Integrated Algebra

 In this lesson, you’ll learn to add, subtract the algebraic expressions. It explains about like and unlike terms, monomials and polynomials and how to add and subtract them. Two or more terms containing the same variable or variables with corresponding variables having the same exponents are called like or similar terms. E.g. 5x2 and 7x2. Two terms are unlike when they contain different variables or the same variable or variables with different exponents. E.g. 3x and 4y, 5x2 and 5x3. A term that has no variable in the denominator is called a monomial. E.g. 5, -5w, 3w2/5 etc are monomials, but 5/w is not a monomial. A monomial or the sum of monomials is called a polynomial. (More text below video...)
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 (Continued from above)  It may have one or more terms. For example, 10a+12b (binomial as it has two unlike terms), x2+3x+7 (trinomial as it has three unlike terms) etc. Remember: We can only add or subtract like terms or those with the same letter raised to the same power. The video below will explain in detail with the help of several examples.

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