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Published byRobert Rice Modified over 3 years ago

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Simplifying Expressions

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Objective simplify and evaluate algebraic expressions

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Evaluating Expressions Remember to use correct order of operations. 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.

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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. 6 + 45 – 20 51 – 20 31

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Evaluating Example

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Substitute in the numbers.

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Evaluating Example Substitute in the numbers.

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Evaluating Example Remember correct order of operations. Substitute in the numbers.

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Common Mistakes IncorrectCorrect

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More Examples

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