Pg. 483 (2, 4, 8, 10)

Bell Ringer #5

Chapter 8.4NotesSpecial Products

SWBAT find squares of sums and differences.

SWBAT find the product of a sum and a difference.

Students will look for and make use of structure.

Objectives

(a + b)2 = (a + b)(a + b) = a2 + 2ab + b2

Find (3x + 5)2

Guided Practice #1)a) (8c + 3d)2 b) (3x + 4y)2

Example 1: Square of a Sum

(a - b)2 = (a - b)(a - b) = a2 - 2ab + b2

Find (2x – 5y)2

Guided Practice #2a) (6p – 1)2 b) (a – 2b)2

Example 2: Square of a Difference

Each edge of the cube is 4 cm less than each of a cube of copper. Write an equation to model the surface area of the aluminum cube.

Example 3: Square of a Difference

Alano has a garden that is g feet long and g feet wide. He wants to add 3 feet to the length and the width.

a) Show how the new area of the garden can be modeled by the square of a binomial.

b) Find the square of the binomial.

Guided Practice #3 (pg. 487)

(a + b)(a - b) = (a - b)(a + b) = a2 - b2

Find (2x2 + 3)(2x2 – 3)

Guided Practice #4a) (3n + 2)(3n – 2) b) (4c – 7d)(4c + 7d)

Example 4: Product of a Sum or Difference

3 Things you Learned

2 Things you Understand

1 Thing that still Confuses you.

Homework: Chapter 8.4 Skills Practice in WBEXTRA PRACTICE!! Pg. 489; 13-42 odds

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