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ABSOLUTE VALUE - Solving Equations

ABSOLUTE VALUE - Solving Equations

Author: Kate Sidlo
Description:

By the end of this tutorial, students will be able to solve absolute value equations with one variable. 

Students will be able to substitute both values back into the original equation to verify they are correct.

This podcast is an introduction to solving absolute value equations with one variable.  Students will use PEMDAS and the balance method to find the two possible solutions to each equation.

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Tutorial

TO DO:

Watch the video and/or slides below and take notes.

Use your notes (the steps in the notes) and follow the examples to help you practice this concept.

ABSOLUTE VALUE - Solving Equations

This video walks students through solving absolute value equations, finding both possible answers and checking the answer using substitution.

The video lays out four simple steps:

1) Balance to get the absolute value alone
2) Write two equations (one positive absolute value, one negative)
3) Balance the two equations
4) Check your answer

The video works through four examples.

Extraneous Solutions

Add these slides to your notes, you don't need to start a new page, just continue where you left off from the video.

VOCABULARY

ABSOLUTE VALUE: The distance between a number and zero on the number line

EQUATION: A mathematical sentence that shows the relationship between expressions using an equal sign

 

ADDITIONAL RESOURCES

PURPLE MATH -
Learn more about solving absolute value equations from purplemath.com

MATH WAREHOUSE -
Learn more about solving absolute value equations by reading at mathwarehouse.com

KHAN ACADEMY -
Watch some videos about solving absolute value equations at khanacademy.com