1、 7(7x27xyx)(6x29xy2x) 6 4 4(xy y29)(x2xy6y24) 5 3 3 1(xyy)(xyx8) 4 7(3y7x3z2)(2y7x7z2) (9k28k)( k29k8) (9a29a6b)(8a27a8b) 4x2(4x26x8)(7x2) 4y2(3x2y)(8x23y2) 1(6x26xyx)(6x24xy9x) 3 5 9(xy y26)(x2xy y21) 6 8 1 1(xyy)(xyx9) 3 4(3y9x4z2)(9y8x9z2) (6k24k)(7k2 k8) (5a27a7b)(3a22a7b) 9x2(9x27x1)(2x3) y2(7x
2、2y)(7x27y2) (4x26xyx)( x28xy2x) 5 1(xy4y21)(x2xy y22) 6 4 1 5(xyy)(xyx9) 5 4(8y4x6z2)(2y3x6z2) (8k29k)(2k26k6) (4a2 a2b)(7a28a3b) 5x2(8x22x7)(2x5) 9y2(6x2y)(9x23y2) 4(6x23xyx)(9x25xy7x) 5 4 1(xy3y22)(x2xy y27) 3 3(xyy)(xyx2) 6 3(4y3x8z2)(9y3x7z2) (6k27k)(3k26k1) (4a26a b)(7a27a4b) 2x2(4x26x4)(4x7) 6y2(8x2y)(5x26y2) 8(5x25xyx)(2x2 xy3x) 4 9(xy4y23)(x2xy6y24) 3 8 5 1(xyy)(xyx5) 4 8(4y2x9z2)(5y3x7z2) (3k25k)(6k25k2) (4a23a4b)(6a29a8b) 4x2(8x29x3)(7x8) 5y2(3x2y)(6x23y2)