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7.2 Simplifying Expressions
Objective: Students will demonstrate they know the parts of an expression and how to combine like terms.
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Definitions Parts of Expression Term: parts of an expression.
Coefficient: number in front of variable. Constant term: term with no variable Like terms: terms with same variable parts.
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Identifying Parts Given the expression. 5x + 4x + 7
Identify the terms, coefficients, like terms, and constant terms. 5x + 4x + 7 Constant Term = 7 Like Terms 5x, 4x Terms: 5x, 4x, 7 Coefficients 5, 4
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Teacher Examples For the following, Identify the terms, like terms, constant terms, and coefficients. 6x2 + 5x – 4x + 7
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Identify the terms, like terms, coefficients, and constants
14x x 5y + 23 – y – 6
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Simplifying Expressions
Note: to simplify combine like terms! Ex: 6x + 5x – 7 + 8 5x + 2x 41c2 – 4c2 + 2c2 8b – 9b
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Student Examples 2c + 2 – (c + 2) 11y – 3(6 – y) 9n - (6n – 6)
5(d + 3) + 7d 2c + 2 – (c + 2) 9n - (6n – 6)
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Finding Perimeters Perimeters: add all sides 8x 3x + 4
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Student Examples Find the perimeter. 7x + 3 4x 8x - 2
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Wrap-up Questions/Comments Hw: worksheet
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Do the following 3x – 4x + 5 – 7 Terms: Like Terms: Constants:
With the expression below state the following: Like terms, constants, terms, coefficients, and simplify. 3x – 4x + 5 – 7 Terms: Like Terms: Constants: Coefficients: Simplified:
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