Subtracting Linear Expressions

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Presentation transcript:

Subtracting Linear Expressions September 11, 2018

Vocabulary 1) A variable is a symbol, commonly an alphabetic character or letter that represents a unknown number. (example: x) 2.) The coefficient is the numerical factor of a term that contains a variable. (example: 3x) 3.) A constant is a term with no variable. (example: 4) 4.) Like terms are terms that have the same variables and powers. (example: 3r and 5r)

Algebra Tiles 1 zero pair: -1 x -x zero pair:

Model and simplify the following expression using Algebra Tiles. Example 1: (3x – 2) – (x + 1) opposite flip tiles Zero pairs: Left: 2x - 3

Model and simplify the following expression using Algebra Tiles. Example 2: (2x – 4) – (2x + 1) opposite flip tiles Zero pairs: Left: - 5

Model and simplify the following expression using Algebra Tiles. Example 3: (x + 4) – (2x – 5) opposite flip tiles Zero pairs: Left: -x + 9

Model and simplify the following expression using Algebra Tiles. Practice: 4.) (-x + 10) – (-4x + 2) 5.) (-2x – 5 ) – (x + 5) 6.) (-5x + 4) – (-3x + 6) 7.) (4x – 1) – (x – 7)

Model and simplify the following expression using Algebra Tiles. Independent Practice (Exit Ticket) 8.) (-5x + 2) – (-x + 8) 9.) (3x – 8) – (4x – 9)