原始一提二套三分组四交叉.doc

提取公因式法1、 2、 3、4、 5、 6、7、 8、 9、10、 11、 12、13、 14、15、 16、17、 18、19、 20、 21、 22、23、 24、25、为自然数） 26、为大于2的自然数）27、 28、29、8a3b2-12ab3c 30、-4x3+16x2-26x 31. m(a-b)-n(b-a) 32、6(y-2)+y(2-y) 33、5(x-y)3+10(y-x)2 34. 3 (y-x)2+2(x-y)35、6(p+q)2-2(p+q) 36. 2(x-y)2-x(x-y) 37. m(m-n)2-n(n-m)238. mn(m-n)-m(n-m)2 39. 2x(x+y)2-(x+y)3 40. p(a2+b2)+q(a2+b2)-r(a2+b2)41. 2a(x+y-z)-3b(x+y-z)-5c(x+y-z) 42. 6m2n-15mn2+30m2n2 43. -16x4-32x3+56x244. -4a3b2+6a2b-2ab 45. 6q(p+q)-4p(p+q) 46. (m+n)(p+q)-(m+n)(p-q)47. a(a-b)+(a-b)2 48. x (x-y)2+y(y-x) 49. (2a+b)(2a-3b)-3a(2a+b)50. x(x+y)(x-y)-x(x+y)2 51. p(x-y)-q(y-x) 52. m(a-3)+2(3-a)53. (a+b)(a-b)-(b+a) 54. a(x-a)+b(a-x)-c(x-a) 55. 10a(x-y)2-5b(y-x)56. 3(x-1)3y-(1-x)3z 57. x(a-x)(a-y)-y(x-a)(y-a) 58. -ab(a-b)2+a(b-a)2-ac(a-b)2运用公式法1. a2-b2 2. x2-1 3. x2-16 4. 9m2-4n2 5. 1-25b26. x2y2-z2 7. 8. x2-4 9. 9-y2 10. 1-a211. 4x2-y2 12. 13. 36-m2 14. 4x2-9y215. 0.81a2-16b2 16. 36m2-1 17. 25p2-49q2 18. (x+p)2-(x+q)219. 16(a-b)2-9(a+b)2 20. 4a2-(b+c)221. (3m+2n)2-(m-n)2 22. x5-x3 23. x4-y4 24. 2ab3-2ab 25. x3-16x 26. 1-a4 27. x4+16 28. a2+2ab+b2 29. a2-2ab+b230. x2+6x+9 31. x2+2x+1 32. 4a2+4a+1 33. 1-6y+9y234. 1+m+ 35. x2-4x+4 36. x2-12xy+36y237. 25p2+10pq+q2 38. 39. 40. 25x4+10x2+1 41. x2-4y2+4xy 42. 16a4+24a2b2+9b443. (x+y)2 -10(x+y)+25 44. -2xy-x2-y2 45.ax2+2a2x+a346. a2-49 47. 64-x2 48. 1-36b2 49. m2-81n250. 0.49p2-144q2 51. 121x2-4y2 52. a2p2-b2q2 53. 54. (m+n)2 -n2 55. 169(a-b)2-196(a+b)2 56. (2x+y)2-(x+2y)257. (a+b+c)2-(a+b-c)2 59. 4(2p+3q)2-(3p-q)2 60. (x2+y2)2-x2y261. 81a4-b4 62. 8y4-2y2 63. 3ax2-3ay4 64. m4-165. a2+8a+16 66. 1-4t+4t2 67. m2-14m+49 68. b2-22b+12169. y2+y+ 70. 25m2-80m+64 71. 4a2+36a+81 73. 4p2-20pq+25q274. 75. 25a4-40a2b2+16b4 76.36x4-12x2y+y2 77. a2b2-4ab+478. 16-8xy+x2y2 79. (x+y)2+6(x+y)+9 80. a2-2a(b+c)+(b+c)281. 4-12(x-y)+9(x-y)2 82. (m+n)2+4m(m+n)+4m2 83. 2xy-x2-y284. 4xy2-4x2y-y3 85. 3-6x+3x2 86. 16x4-y4 87. x8-y8分组分解法1. am+an+bm+bn 2. a2-ab+ac-bc 3. 20(x+y)+x+y 4. p-q+k(p-q)5. 5m(a+b)-a-b 6. 2m-2n-4x(m-n) 7. ac+bc+2a+2b 8. a2+ab-ac-bc9. 2ax-10ay+5by-bx 10. 3ax+4by+4ay+3bx 11. m2+5n-mn-5m12. 3a-ax-3b+bx 13. xy-y2-yz+xz 14. 5ax+6by+5ay+6bx15. 4x2+3z-3xz-4x 16. x2-y2+ax+ay 17. a2-2ab+b2-c218. x3+x2y-xy2-y3 19. xy-xz+y-z 20. a2+ab+ac+bc21. ax-2bx+ay-2by 22. 4xy-3xz+8y-6z 23. x3+3x2+3x+924. 3xy-2x-12y+8 25. ab-5bc-2a2+10ac 26. 5ax+7ay-5bx-7by27. x3y+3x-2x2y2-6y 28. 6ax+15b2y2-6b2x-15ay2 29. 7x2-3y+xy-21x30. 3a2+bc-3ac-ab 31. a2m+bn-an-abm 32. x2-a2-2x-2a33. 4x2-4xy+y2-a2 34. 1-m2-n2+2mn 35. a-a3 36. x3y-xy337. a3-b3 38. x3-y3 39. x3+125 40. a3+8b3 41. 27m3-n342. 1- 43. 0.064p3+1 44. 27m3-n3 45. x3y3-27 46. 3x3+2447. p3-q6 48. (a+b)3+c3 49. (2x+1)3-x3 50. a-a451. x+x4 52. a4b-ab4 53. 4x2-y2+2x-y 54. a4+a3+a+155. x4y+2x3y2-x2y-2xy2 56. x3-8y3-x2-2xy-4y2 57. x4+458. (z2-x2-y2)2 4x2y2 59. 4x4+160. x2+5x+6 61. x2+3x+2 62. x2-4x-21 63. x2-7x+664. x4+6x2+8 65. (a+b)2-4(a+b)+3 66. x2-3xy+2y2 67. x4-3x3-28x2 68. x2+4x+3 69. a2+7a+10 70. y2-7y+1271. q2-6q+8 72. x2+x-20 73. m2+7m-18 74. p2-5p-3675. t2-2t-8 76. x4-x2-20 77. a2x2+7ax-8 78. a2-9ab+14b279. x2+11xy+18y2 80. x2y2-5x2y-6x2 81. a3-4a2+12a 82. 3x2+11x+1083. 2x2-7x+3 84. 6x2-7x-5 85. 5x2+6xy-8y2 86. 2x2+15x+787. 3a2-8a+4 88. 5x2+7x-6 89. 6y2-11y-10 90. 5a2b2+23ab-1091. 3a2b2-17abxy+10x2y2 92. 4x4y2-5x2y2-9y2 93. x2+9x+894. x2-10x+24 95. x2+3x-10 96. x2-3x-28 97. a2+4a-2198. m2+4m-12 99. p2-8p+7 100. b2+11b+28 101. x4+7x2-18102. x6+8x3+15 103. m2x2-8mx+12 104. x2y2-7xy+10 105. x2-7xy+12y2106. a2+2ab-15b2 107. m2+4mn-12n2 108. p2+9pq+18q2 109. x2y+6xy-8y110. (m+n)2-(m+n)-30 111. ab2+4abc+3ac2 112. (x-y)2-3(x-y)-40113. x3-15x2-16x 114. 1-26a2+25a4 115. (x2+2x)2-7(x2+2x)-8116. a6+7a3-8 117. (x+y)4+(x+y)2-20 118. 5x5-15x3y-20xy2119. 2x2+3x+1 120. 2y2+y-6 121. 6x2-13x+6122. 3a2-7a-6 123. 6x2-11xy+3y2 124. 4m2+8mn+3n2125. 4n2+4n-15 126. 6t2+t-35 127. 10x2-21xy+2y2128. 8m2-22mn+15n2 129. (x2+3x-2)(