Practice and Applications

5. $- 4, 1$ $- 4, 1$
7. 3, 7
9. $\frac{1}{3}, - 4$ $\frac{1}{3}, - 4$
11. $\frac{1}{2}, \frac{5}{3}$ $\frac{1}{2}, \frac{5}{3}$
13. $0, \frac{9}{2}$ $0, \frac{9}{2}$
15. $- \frac{3}{2}, \frac{7}{2}$ $- \frac{3}{2}, \frac{7}{2}$
17. $- 8, 12$ $- 8, 12$
19. $- 1 \pm \sqrt{7}$ $- 1 \pm \sqrt{7}$
21. $- 4, \frac{9}{2}$ $- 4, \frac{9}{2}$
23. $\frac{1}{8} (3 \pm \sqrt{41})$ $\frac{1}{8} (3 \pm \sqrt{41})$
25. $\frac{1}{42} (- 23 \pm \sqrt{- 4091})$ $\frac{1}{42} (- 23 \pm \sqrt{- 4091})$
27. $\frac{1}{6} (- 2 \pm \sqrt{58})$ $\frac{1}{6} (- 2 \pm \sqrt{58})$
29. $\pm \sqrt{5}$ $\pm \sqrt{5}$
31. $- 2 \pm 2 \sqrt{2}$ $- 2 \pm 2 \sqrt{2}$
33. $\frac{1}{3} (- 4 \pm \sqrt{10})$ $\frac{1}{3} (- 4 \pm \sqrt{10})$
35. $- 1, \frac{3}{4}$ $- 1, \frac{3}{4}$
37. No real roots
39. No real roots
41. $\frac{- 3 \pm \sqrt{9 + 4 a^{2}}}{2 a}$ $\frac{- 3 \pm \sqrt{9 + 4 a^{2}}}{2 a}$
43. $- 5, 6$ $- 5, 6$
45. $\frac{1}{4} (1 \pm \sqrt{33})$ $\frac{1}{4} (1 \pm \sqrt{33})$
47. $3 \pm \sqrt{7}$ $3 \pm \sqrt{7}$
49. 0 (3 is not a solution)
51.
53.
55. $- 3.26, 2.76$ $- 3.26, 2.76$
57. No real roots
59. $x = - 4$ $x = - 4$
61. 0, L
63. 1.57
65. 17
67. $202 ° F$ $202 ° F$
69. 0.6 s, 1.9 s
71. 8000
73. $\frac{- π h \pm \sqrt{π^{2} h^{2} + 2 π A}}{2 π}$ $\frac{- π h \pm \sqrt{π^{2} h^{2} + 2 π A}}{2 π}$
75. $\frac{1 + r \pm \sqrt{{(1 + r)}^{2} - 4 r p_{2}}}{2 r}$ $\frac{1 + r \pm \sqrt{{(1 + r)}^{2} - 4 r p_{2}}}{2 r}$
77.
79. 9.9 cm
81. 61 m, 81 m
83. 15.3 cm, 11.3 cm, 4.00 cm
85. 29.4 in., 52.3 in.
87. 25
89.

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Table of Contents for Practice and Applications