1. 1
1. 2 3 2
P x 5 9 x 3 x 1
.
2.
2 4 2
P x 6 8 x 2 x 3 10 .
3. 3 2
P x 4x 6x 4x 8 3 2
Q x x x x
P x Q x
3
4.
2 3 2
P x 2 x 5 6 x 1
2
5. ,
2 2
P x x 2x 6 2 2
Q x x 1 x 4 1
6. 2
P x 2 x 2 6 x 3
7. 3 2 2
P x 5x x 9 8
3 2
Q x 4 x x 1
8. , , , 4 3 2
P x x x x x 16
2
Q x x x .
9.
2
3x 3
x 9
10. P x
P 2x 1 P 2x x .
11. P x P x P x 1 x
x .
12. 3 2
P x x 3x 2x P x 1 P x .
13. P x 2 2
P x P x x 5x 6 x .
14. P x 2 2
P P x 27x 36x 14
x .
2. 2
15. 2
P x 2x 3x 1 2
Q x x 3 .
P Q x .
, , , , 8 6 4 2
x x x x P Q x
x .
16. P x Q x P x 2 Q x 1 2 .
P x Q x
P x Q x 4 2Q x P x
17. 2
P x 2x 3x 1 2
Q x x 3 .
P Q x .
, , , , 8 6 4 2
x x x x P Q x
x .
18. P x 2 2
P P x 27x 36x 14
x .
19. P x P x x
P P x x .
20. P x P x 2x
P P x 2 2.
21. P x
2 2
P x 1 P x 3 x
P 0 0 P 25 .
22. P x P 2x 1 3P x 2 x
P 0 0 P 15 80 .
23. 10 8 6
x x x 1 0 2.
3 2
5x 2 x 3 0 2 3 5 .
24. 5 4 3 2
P x x x x x x 1 2.
1 2
P x x x ... x x 1 2.
25. 3 2
P x x 3x 3x 3
4 .
26. 3 2
P x x x x , , , , 0
2
3. 3
27. 0 4 3
P x x x x , 0 .
P x
1
.
,
28. 2
P x x 1 x 2 -
3 2 2
x x 4x 1 x .
29. ,
2 2
P x 3x x 2 x 5x 1 1 1.
30.
31.
4 3 2
P x x x x 3x 4 2
x 2x 5 11x 36 .
32.
4 2 2
x x 3x 3 : x 3x 2 2
5x 12x 32 : x 4
4 2
3x x 4x 3 : x 3 4 4
x k : x k
33. 3 2 2
2x 7x 11x 4 : x 3x 4
34. 3 2
P x 4x 5x 6x 8
P x : x 1 P x : x 2
35. 3 2 2 4 3 2
P x x 3x 1 x 3x 4 x x 6x 2x 3.
P x
3 2
x 3x 1 2
x 3x 4
36. Horner 3 2
P x 2x 5x 6x 9,
x 1 x 3
37. Horner
4 3 2
P x x 9x 30x 44x 24
2
x 2 .
38.
3 2
P x 2 x 2 x 5 6 x 1
39. , 3 2
P x x 2 x x 6
x 1 x 2 .
4. 4
40. , 4 2
P x x 1 x x 1
2
x 3x 2.
41. ,
1
P x x x
2
x 1 .
42.
1821 25 25
P x x 1 x 3 x 1
x 1. P x 0 1.
43.
200
2 2
P x 3x 3x 1 x 1
44. P x 2
x x 2 3x 1
P x : x 1 P x : x 2 .
45. P x : x
P x : x ,
P x : x x .
46. P x : x 2
2
P x : x 4x 3 3x 5
2
P x : x 2 x 4x 3 .
47. P x x
x x
Q x P P P x x .
48. P x x x
Q x P P x x .
49. P x P x 1 P x x x .
P x x 1.
P x x 1821.
P x
50. P x x 1 x 2 7
P x : x 1 x 2 .
51. P x x x ,
x x .
5. 5
52.
3 2
P x x x 1 x 5 x 1 x 2 .
53.
3 2
P x x x 3 x 10
2
x 2 .
54. P x 2 ,
P x x x
P P P P
x x
55. 2
P x 3 x x 3 , Q x P 2 x 2xP x 1 .
Q x x 2
56. P x x 3 x 5 1 x
2 x 1 25 3 .
57. P x 2
Q x x x , , 2 2
4 ,
P x
58. P x x 1
P x 1 P x x x .
59. 3 2
x 2x x 4 0
60. P x x 2 x 3
P x x 2 x 3 .
61. P x x 2
2
x 4x 3 2x 7
2
P x : x 2 x 4x 3 .
62. 3 2
P x x 2x x , , P x x 1
x 2
5 6 . P x 0.
63. 4 3 2
P x x x x 5x 4, , P x
2
x 1
1 1. P x 0.
64. 3 2
P x x x x 6, , P x
2
x 4x 3
6 9 . P x 0.
6. 6
65. 4 3 2
P x x 8x 5 1 x 8x 3 6 .
P x x2
1
3 P x 0
P x x x.
66. ,
8 2 8
.
67. 3 2
P x 4x 8x 5x 1 3
Q x 4x 3x 1
68. 3 2
P x x 3x 2x 1 3
Q x x 5x 8
69. 3 2
P x x x 5 x 4, .
P x
1
2
3 3
P x x 6P x 6x 5.
70. P x 2
x 2 P x x 1 P x 2 x
x P x x 2 2
P x x 4.
P x 2
x 6x 8 .
P x x 1.
P x
71. 4 3 2
P x x x x 6x 4 2
x 2.
3 4 . P x 0.
72.
1821 1453
P x x x 2 x 1 2
P x 3 2
Q x x 3x 2x.
1821 1453
10 8 9 89
73.
20 15
P x x 4 2x 5 2 .
x 3 P x .
40 15
2 11 2
20 15
9 21 1
74. 2
P x x x 1
3 2 3 1 3
Q x x x x , , , .
7. 7
75. 3 2
P x x x x 1
4 3 4 2 4 1 4
Q x x x x x , , , , .
P x 2.
P x
i. Q x P x ii. Q x .
76.
20 30
P x x 10 x 20 x 30 .
P x 0.
P x x 10. P x 0.
77. x) 2
x 1
3
P x x x .
3 2
x 2 x 2 x 2
78. 4 3 2
P x x x x 5x 4, , P x
2
x 1
1 1. P x 0.
79.
3
x 7x 6 0 3 2
x x 10x 8 0 4 3 2
x 3x x 3x 2 0
80.
3
x 8x 7 0 4 3 2
x 5x 6x x 2 0
3
x 2x x x 2 0 4 3 2
x 2x 7x 8x 12 0
81.
3 2
f x 4x 8x x 3 x x.
82.
2
5x 9 x 1 0
83.
2
8 x 2 1 x 1 0
84.
4 3 2
x 3x x 3x 2 0 3
x x 1 2 x x 1
3 2
x 2x x 2 0 3 3 2
x 3x 5x 9
4 3 2
3x x 9x 9x 2 0 4 3
x 3x 6x 4
85.
4 3 2
f x x 2x 3x 8x 4
86. 4 3 2
P x x x 11x x 18
2.
8. 8
1 9 .
P x 0 .
87.
6 3
2 2
x 3x 2 9 x 3x 2 8 0
8 4
x 3 3 x 3 4 0
4 2
3 3
x 11x 12 3 x 11x 12 4 0
4 2
2 x 1 6 2 x 1 7 0
3 2
2 x 5 x 5 x 2 0 4 3
2 x 5 x 5 x 2 0
88.
x 1 2 x 3 4 2x 7 x 2 x 2x
89.
5x 10 8 x 2x 6 x 1 2
x 32 x 16
4x 20 4 x
24 x
2
x 1 1
x 1
4
2 x 2
3 2 x
2 2
2x 7 x 4 x 3x 5
90.
3x 7 x 3 x - 1 x 1 x 5 2 1
x x 3 x
2
91.
4 3 2
x 4x 6x 4x 1 0 4 3 2
6x 25x 12x 25x 6 0
92. 4 3 2
f x x x x x 2, x
x 1 f x x
f x x
x 2 x
x x 2 .
f
x x.
93. k 3 2
x kx k x x 1
1
7
2
1 23 k 6 5.
P x k 6 5 2x 1
P x
P x 7 k 6 5.
94. 3 2
x x 6x 11x 6
x) x 1.
9. 9
P x x 1.
P x 0.
95. P x x2
3
P x x x .
3 2
P x 2 P x 2 P x 2 .
96. 4 3 2
P x x 8x 5 1 x 8x 3 6
P x x2
1
3 P x 0
P x x x.