NAME _______________
MAT 150 – Homework 9
Sections 2.7 and 2.8
Directions: Show all work and write your final answer in the space provided.
1.
Find the zeros of f(x) = x2 + 4x + 8.
1. _______________
2.
Solve |2x – 5| = 11.
2. _______________
3.
Solve |7x + 6| > 4 and write your final answer using interval notation.
3. _______________
4.
Find the zeros of g(x) = –3x2 + 6x + 1.
4. _______________
5.
Solve |4 – 9x| ≤ 8 and write your final answer using interval notation.
5. _______________
6.
Find the zeros of h(x) = x3 – 4x2 + 9x – 36.
6. _______________
7.
Solve |x2 + 3x – 2| = 2.
7. _______________
8.
Find the zeros of f(x) = 9x2 – 30x + 25.
8. _______________
9.
Solve |4x – 9| – 6 = 2.
9. _______________
10. Solve 2|5x – 1| + 7 ≥ 21 and write your final answer using interval notation.
10. _______________
11. Find the zeros of g(x) = x4 – 11x2 – 80.
11. _______________
12. Solve |x2 – 10x| = 24.
12. _______________
13. Find the zeros of h(x) = 4x2 + 4x + 3.
13. _______________
14. Solve
3x  2
 11.
4
15. Solve 1 
2x  1
 2 and write your final answer using interval notation.
3
14. _______________
15. _______________
16. Find the zeros of f(x) = 2(x – 6)2 + 18.
16. _______________
17. Solve |7 – 3x| + 11 = 4.
17. _______________
7
18. Solve 2  5x  .
4
18. _______________
19. Find the zeros of g(x) = 2(x + 4)2 +3(x + 4) – 14.
19. _______________
20. Solve |4x + 5| + 12 > 6 and write your final answer using interval notation.
20. _______________