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**Simplifying Expressions**

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Objective simplify and evaluate algebraic expressions

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**Evaluating Expressions**

Evaluate the expression 2x – 3xy +4y when x = 3 and y = -5. To find the numerical value of the expression, simply replace the variables in the expression with the appropriate number. Remember to use correct order of operations.

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**Example Evaluate 2x–3xy +4y when x = 3 and y = -5.**

Substitute in the numbers. 2(3) – 3(3)(-5) + 4(-5) Use correct order of operations. – 20 51 – 20 31

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Evaluating Example

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Evaluating Example Substitute in the numbers.

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Evaluating Example Substitute in the numbers.

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**Evaluating Example Substitute in the numbers.**

Remember correct order of operations.

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Common Mistakes Incorrect Correct

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More Examples

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1.2 – Evaluate and Simplify Algebraic Expressions A numerical expression consists of numbers, operations, and grouping symbols. An expression formed by.

1.2 – Evaluate and Simplify Algebraic Expressions A numerical expression consists of numbers, operations, and grouping symbols. An expression formed by.

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