Chapter 10 Review Sheet-answers

Answers to Ch 10 Review Sheet

8. 0, 8

p. 1

9. ¼, -3/2

1. (x+6)(x – 1)

10. no real solution

2. (2x + 5)(x – 4)

11. 0, 10

3. 3(x2 + 25)

12. 5/2, 1

4. 3x2y3(4x + 5y – 7x2y3)

13. 5/2

5. (5x – 3)(x – 2)

14. -4/5, 1

6. 2(4x – 5)(4x – 5)

15. (1 +/- rt.2)/2

7. not factorable

p.3

8. 4(x + 5)(x – 5)

1. 5x2 – 17x -12

9. 2(x – 7)(x + 3)

2. 6x2 – 3x + 1

10. (5x + 4y)(5x – 4y)

3. 2x2 – 9x + 9

11. (x + 2)(x – 2)(x + 1)

4. -3x2 + 6x – 2

12. (a – 9b)(a – 2b)

5. 25x2 – 20x + 4

13. (4 + 9x2)(2 + 3x)(2 – 3x)

6. 8x3 – 6x2 – 25x – 12

14. (x + y)2(x – y)

7. (-4, 0), (-2, 0); (-3, -1)

15. (2x – 3)(3x + 5)

8. (5, 0), (-1, 0); (2, -9)

p. 2

9. (2, 0), (-2, 0); (0, -4)

1. 6, 2

10a. h = -16t2 + 48t + 64

2. 0, 10/3

10b. 4 seconds

3. 2 +/- 2rt.2

10c. 100 feet

4. no real solution 5. -4 6. -2 +/- (rt.10)/2 7. 2/3, 3