Quimica

UNIVERSIDAD POPULAR DE LA CHONTALPA
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En los ejercicios 21 a 70, simplifique cada expresión algebraica.
21. 4x+7x =
22. 5y-2y =
23. 3z-z =24. 7w+4w-w =
25. 8x+9x2-2x =

26. 11y-7y+6y2 =

27. 10w+w2-8w2 =

28. y2-6y2+4y =

29. ax2+a2x+ax2 =

30. by-by2+by =

31. 7xy2-5x2y+4xy2 =
32. 12wz-8w2z+6w2z =
33. (a+6b) - (a-6b)=
34. (x-7y) – (7y-x) =
35. (2 a2+3b) + (2b+4 a2) =
36. (7c2-8d) + (6d-8c) =
37. (4x2+3x) – (2x2-3x) =
38. (3y2-4x) – (4y+2x) =
39. 2(6y2 + 7x) =
40. 5(3 a + 4b) =
41. -3(4b - 2c) =
42.-2(-6b + 3 a) =
43. 4(a + b) + 3(b + a) =
44. 2(c + d) + 8(d + c) =
45. 3(x + y) – 2(x + y) =
46. 3(x2 - y) – 2 (y + x2) =
47. 2(a + b + c) + 3(a + b - c) =
48. 4(x - y+ z) + 2(x + y-z) =49. 3[2(x + y)] =
50. 4[3(x - y)] =
51. 3(a + b) + 4(a + b) – 2(a + b) =
52. 2(x + y) -3(x + y) -4(x + y) =
53. 2(a +b + c) +3(a –b + c) + (a – b - c) =
54. 3(x-y+z) -2(x+y-z) + 4(-x-y+z) =
55.2(x+3y) – 3(x-2y) + (5(2x-y) =
56. 3(y-2 a) – (a + 3y) + 4(a - 3y) =
57. 3(x + y - z) -2(3x + 2y - z) – 3(x – y + 4z) =
58. 5(x - y + z) (y – x + z) + 2(z-2y+z) =
59. (x + y) – 3(x-z) +4(y+4z) – 2(x+y-3z) =
60. (a + b) – 2(b-c) + 4(c+2d) – 5(d+2c-3b-a) =
61. x + [3x+2(x + y)] =
62. x + [5y + 3(y - x)] =
63. y- [2z-3(y + z)+y] =
64. 2w- [4z-5(z + w)+2w] =
65. [2x+3(x +y)-2(x-y)+y]-2x =
66. [4 a-8(a + b)+2(a-b)+3 a] – 3b =
67. – {-[2 a- (3b+a)]} =
68. – { - 3[4x-(5x-4y)]} =
69. 5a -2{4[a + 2(4 a + b) -b] + a} – a =
70. 7x - 3{-[x + 2(x - y)- y] + 2x} – 3y =

Enlos ejercicos 1 a 4 identifique las variables y constantes de cada expresión.
1. 4xy 2. 5x2/3tw 3. 8r2 4.  7ax+ by

En losejercicios 5 a 8 identifique los términos algebraicos de cada expresión.
5. 3x3 + 4x 7. (2x3)(5y) + 3ab- 7ab
6. 47x4 – 9y5...