1. Algebra 1 7.7 Multiplying Polynomials

2. Learning Targets Language Goal Students should be able to read, write, say, and classify polynomials. Math Goal Students should be able to multiply polynomials. Essential Question What information can you gather after multiplying polynomials?

3. Warm-up

4. Multiplying Monomials What are monomials? Polynomial with only one term Multiplying Monomials - Group factors with like bases together. Then multiply.

5. Example Type 1: Multiplying Monomials

7. Example Type 2: Multiplying a Polynomial by a Monomial Multiplying a Polynomial by a Monomial -Use the Distributive Property!

8. Example Type 2: Multiplying a Polynomial by a Monomial A. 5(2x + x + 4) B. 2x y(3x – y) C. 4a(a b + 2b )

9. Example 3:Multiplying Binomials -There are a couple different methods you decide what is best for you. You can use the distributive property twice. You can foil. You can use the box method.

10. Multiplying Binomials Method 1: Apply the Distributive Property twice (can box) (x+3)(x+2)

11. Multiplying Binomials Method 2: FOIL METHOD (x+3)(x+2) First Outer Inner Last Combine like terms/Simplify

12. Example Type 3: Multiplying Binomials

13. Example 4: Multiplying Polynomials Again there are multiple ways to solve. Find the way that you like and use it!! Distributive Property Rectangular Model Vertical Model

14. Example 4: Multiplying Polynomials

17. Example Type 4: Multiplying Polynomials A. (x + 2)(x² – 5x + 4) B. (3x – 4)(-2x² + 5x – 6)

18. Example Type 4: Multiplying Polynomials A. (x + 2)(x² – 5x + 4) B. (3x – 4)(-2x² + 5x – 6)

19. Example Type 4: Multiplying Polynomials

20. Example Type 5: Word Application A. The length of a rectangle is 5 inches greater than the width. 1.Write an expression for the width of the rectangle. 2. Write an expression for the length of the rectangle. 3. Write a simplified expression for the area of the rectangle. 4. Find the area of the rectangle when the width is 3 inches. 5. Find the area of the rectangle when the length is 9 inches.

21. Example Type 5: Word Application B. The length of a rectangle is 4 meters shorter than its width. 1. Write a polynomial that represents the area of the rectangle. 2. Find the area of the rectangle when the width is 6 meters.

22. Lesson Quiz