MAT 222 week 4 DQ 1

  

Ashford 5: - Week 4 - Discussion 1

 

Your initial discussion thread is due on Day 3 (Thursday) and you have until Day 7 (Monday) to respond to your classmates. Your grade will reflect both the quality of your initial post and the depth of your responses.

 

     

Solving   Quadratic Equations

Solving Quadratic Equations

In this discussion, you will solve quadratic equations by two main methods: factoring and using the quadratic formula. Read the following instructions in order and view the example to complete this discussion. Please complete the following problems according to your assigned number. (Instructors will assign each student their number.) 

  

If   your assigned number is

Use   FACTORING to solve:

Use   the QUADRATIC FORMULA to solve:

 

1

x2 + 9x + 20 = 0

2 on p. 646

 

2

x2 + 11x + 30 = 0

4 on p. 646

 

3

6x2 + 7x – 20 = 0

6 on p. 646

 

4

x2 + 3x + 2 = 0

8 on p. 646

 

5

x2 + 7x + 12 = 0

10 on p. 646

 

6

x2 – 9x + 14 = 0

12 on p. 646

 

7

x2 + 6x – 27 = 0

14 on p. 636

 

8

x2 – 2y – 24 = 0

16 on p. 636

 

9

x2 + 3x – 18 = 0

18 on p. 636

 

10

2x2 + x – 1 = 0

20 on p. 636

 

11

2x2 – x – 3 = 0

22 on p. 637

 

12

x2 – x = 0

24 on p. 637

 

13

x2 + x – 42 = 0

44 on p. 637

 

14

x2 + x – 20 = 0

46 on p. 636

 

15

x2 + 5x = 0

48 on p. 637

 

16

2x2 + 5x – 3 = 0

50 on p. 637

 

17

3x2 – 10x + 7 = 0

52 on p. 637

 

18

x3 – 9x = 0

54 on p. 647

 

19

25x  – x3  =   0

56 on p. 647

 

20

2x2 + 2x – 24 = 0

58 on p. 647

 

21

x2 – x – 6 = 0

2 on p. 658

 

22

x2 + 6x + 8 = 0

4 on p. 658

 

23

x2 + 2x – 15 = 0

6 on p. 658

 

24

x2 – 2x – 15 = 0

8 on p. 658

 

25

2x2 – x – 3 = 0

10 on p. 658

 

26

6x2 – x – 15 = 0

2 on p. 680

 

27

x2 + 14x + 49 = 0

4 on p. 680

 

28

x2 – 6x + 9 = 0

6 on p. 680

 

29

x2 – 16 = 0

8 on p. 680

 

30

4x2 – 25 = 0

10 on p. 680

 

31

x2 + 10x + 21 = 0

12 on p. 680

 

32

x2 – 6x – 7 = 0

14 on p. 680

 

33

x2 + x – 2 = 0

16 on p. 680

 

34

x2 – 4x – 12 = 0

18 on p. 680

 

35

x2  –10x + 25 = 0

20 on p. 680

 

36

x2 + 6x + 5 = 0

22 on p. 680

 

37

3x2 – x – 24 = 0

24 on p. 680

 

38

3x2 – 6x – 24 = 0

26 on p. 680

 

39

x2 + 9x + 18 = 0

28 on p. 680

 

40

2x2 – x – 15 = 0

30 on p. 680

 

41

x2 – 7x + 12 = 0

2x2 – 3x + 1 = 0

 

42

25x2 – 20x + 4 = 0

16x2 + 1 = 8x

 

43

x2 + 5x + 6 = 0

3x2 – 10x + 8 = 0

 

44

x2 – 6x + 5 = 0

3x2 + x – 2 = 0

 

45

x(x – 5) = 0

2x2 – 7x + 5 = 0

• For the factoring problem, be sure you show all steps      to the factoring and solving. Show a check of your solutions back into the      original equation. 
• For the quadratic formula problem, be sure that you use      readable notation while you are working the computational steps. Refer to      the Inserting Math Symbols handout for guidance with formatting.
• Present your final solutions as decimal approximations      carried out to the third decimal place. Due to the nature of these      solutions, no check is required. 
• Incorporate the following four math vocabulary words      into your discussion. Use bold font to emphasize the words in your      writing. Do not write definitions for the words; use them appropriately in      sentences describing your math work.
  • Quadratic formula
  • Factoring
  • Completing the square
  • Discriminant

Your initial post should be at least 250 words in length. Support your claims with examples from required material(s) and/or other scholarly resources, and properly cite any references. Respond to at least two of your classmates’ posts by Day 7.

Carefully review the Grading Rubric for the criteria that will be used to evaluate your discussion.