Check that! The presenter works several polynomial addition and subtraction problems and shows pupils how to check the answer using the table function in a graphing calculator. By typing in the initial problem and the answer in the calculator, viewers are able to see that for every x value the y values are the same, showing that the two expressions are equivalent.

Concepts

addition polynomials, polynomials, subtraction polynomials

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Additional Tags

math

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Instructional Ideas

• Remind the class what it means for two algebraic expressions to be equivalent

Classroom Considerations

• Learners should be comfortable with combining like terms
• Requires knowledge of subtracting rational numbers

• This video is hosted on YouTube

Pros

• Uses different colors and lines to highlight the like terms
• Shows multiple strategies for adding polynomials

Cons

• None

Common Core

SL.9-10.2 MP5 MP6 HSA-APR.A.1