1. Splash Screen Unit 8 Quadratic Expressions and Equations EQ: How do you use addition, subtraction, multiplication, and factoring of polynomials in order to simplify rational expressions?

2. Splash Screen EQ: How do you find a square of a sum or a difference or the product of a sum and difference? Lesson 4 Special Products

3. Lesson Menu 5 minute check on previous lesson. Do the first 5 problems!

4. Over Lesson 8–3 5-Minute Check 1 A.a 2 + 3a + 3 B.a 2 + 3a – 18 C.2a – 18 D.a 2 + 9a – 3 Find the product of (a + 6)(a – 3).

5. Over Lesson 8–3 5-Minute Check 2 A.6w 2 + 29w B.6w 2 + 29w + 35 C.6w 2 + 14w + 35 D.5w 2 + 14w + 35 Find the product of (3w + 7)(2w + 5).

6. Over Lesson 8–3 5-Minute Check 3 A.5b 2 + 8b – 5 B.25b 2 + 8b + 6 C.25b 3 – 9b + 6 D.25b 3 – 19b + 6 Find the product of (5b – 3)(5b 2 + 3b – 2).

7. Over Lesson 8–3 5-Minute Check 4 A.6a 3 – 9a 2 + 2a – 3 units 2 B.5a 3 – 2a 2 + 2a – 2 units 2 C.4a 3 – 2a 2 + a – 2 units 2 D.3a 3 – a 2 + 3a + 3 units 2 Which expression represents the area of the figure?

8. Over Lesson 8–3 5-Minute Check 6 A.6x 2 + 7x – 10 B.10x 2 – 15x – 2 C.12x 2 – 5x – 2 D.2x 2 + 10x What expression describes the area of the shaded region in square units?

9. Then/Now You multiplied binomials by using the FOIL method. Find squares of sums and differences. Find the product of a sum and a difference. EQ: How do you find a square of a sum or a difference or the product of a sum and difference?

10. Concept (a + b) 2 = a 2 + 2ab + b 2

11. Example 1 Square of a Sum A. Find (7z + 2) 2. (a + b) 2 = a 2 + 2ab + b 2 Square of a sum (7z + 2) 2 = (7z) 2 + 2(7z)(2) + (2) 2 a = 7z and b = 2 = 49z 2 + 28z + 4Simplify. Answer: 49z 2 + 28z + 4

12. Example 1 A.9x 2 + 4 B.9x 2 + 6x + 4 C.9x + 4 D.9x 2 + 12x + 4 B. Find (3x + 2) 2.

13. Concept (a - b) 2 = a 2 - 2ab + b 2

14. Example 2 Square of a Difference A. Find (3c – 4) 2. (a – b) 2 = a 2 – 2ab + b 2 Square of a difference (3c – 4) 2 = (3c) 2 – 2(3c)(4) + (4) 2 a = 3c and b = 4 = 9c 2 – 24c + 16Simplify. Answer: 9c 2 – 24c + 16

15. Example 2 A.4m 2 + 9 B.4m 2 – 9 C.4m 2 – 6m + 9 D.4m 2 – 12m + 9 B. Find (2m – 3) 2.

16. Example 3 Square of a Difference GEOMETRY Write an expression that represents the area of a square that has a side length of 3x + 12 units. The formula for the area of a square is A = s 2. Answer: The area of the square is 9x 2 + 72x + 144 square units. A = s 2 Area of a square A = (3x + 12) 2 s = (3x + 12) A = (3x) 2 + 2(3x)(12) + (12) 2 a = 3x and b = 12 A = 9x 2 + 72x + 144Simplify.

17. Example 3 A.9x 2 – 24x + 16 units 2 B.9x 2 + 16 units 2 C.9x 2 – 16 units 2 D.9x 2 – 12x + 16 units 2 GEOMETRY Write an expression that represents the area of a square that has a side length of (3x – 4) units.

18. End of the Lesson Assignment Do the front of Worksheet #1 to #21 Assignment Do the front of Worksheet #1 to #21 EQ: How do you find a square of a sum or a difference or the product of a sum and difference?

19. Concept (a + b)(a - b) = a 2 - b 2

20. Example 4 Product of a Sum and a Difference A. Find (9d + 4)(9d – 4). (a + b)(a – b)= a 2 – b 2 (9d + 4)(9d – 4)= (9d) 2 – (4) 2 a = 9d and b = 4 = 81d 2 – 16Simplify. Answer: 81d 2 – 16

21. Example 4 A.9y 2 + 4 B.6y 2 – 4 C.6y 2 + 4 D.9y 2 – 4 B. Find (3y + 2)(3y – 2).

22. End of the Lesson Assignment Do the back of Worksheet #22 to #42 Assignment Do the back of Worksheet #22 to #42 EQ: How do you find a square of a sum or a difference or the product of a sum and difference?