7.7 Adding and Subtracting Polynomials

7.7 Adding and Subtracting Polynomials

Algebra 10

Main Idea

• Just like the title says, we will be adding and subtracting polynomials – be careful of negatives!

• Remember how we lined up systems to add?• Remember how important is was to make

sure the same terms were aligned?• LIKE TERMS: same variable, same power

Ex 1 – Adding & Subtracting Monomials

• To add or subtract, simply combine like terms.

Practice 1

Ex 2 Adding Polynomials

• You can add them horizontally or vertically

Ex 2 Adding Polynomials

• You can add them horizontally or vertically

Practice 2

Ex 3 – Subtracting Polynomials

• To subtract a group, distribute the subtraction sign.

Ex 3 – Subtracting Polynomials

• To subtract a group, distribute the subtraction sign.

Practice 3

Review

• How do you identify like terms?• When using a vertical format, what is a

placeholder? How is it helpful?• What is the first step to subtracting

polynomials?• Why are parentheses use when subtracting?• What is the purpose of aligning terms?