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Algebraic Expressions Unit 1-1

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Key Words: Algebraic Expression: An expression that contains at least one variable. Ex. 2x 3x 2 + 3y – 5 Like Terms: Terms with the same variables raised to the same exponents. Ex. 4x 2 and 3x 2 Are 3xy and 4x? Ex. 4x 2 and 3x 2 Are 3xy and 4x?

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Order of Operations PEMDAS Parenthesis ()Parenthesis () Exponents 3x 2Exponents 3x 2 Multiplication and Division*Multiplication and Division* Addition and Subtraction*Addition and Subtraction* *Multiplication and Division must be performed left to right. Multiplication is not necessarily first. Same with Addition and Subtraction.

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Simplifying Algebraic Expressions Distribute

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Multiply or Distribution Combine like terms

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Your turn! Answer:

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Order of Operations PEMDAS *Remember: addition and subtraction is performed left to right!

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Order of Operations PEMDAS

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Your turn! Answer:

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Evaluating Algebraic Expressions ; x = 4 and y = 7 SUBSTITUTE! PEMDAS

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Evaluating Algebraic Equations ; b = 6 and z = 2 SUBSTITUTE! PEMDAS

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Your turn! ; x = 2 and y = 5 Answer:

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ASSIGNMENT Page 30 # 3 - 7

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