1、(3k24k)(6k28k5) (4a25a b)(9a28a8b) x2(3x28x4)(5x3) 7y2(4x2y)(6x25y2) 1(4x24xyx)( x26xy4x) 4 5 1(xy4y24)(x2xy3y24) 4 5 5 1(xyy)(xyx6) 6 7(6y7x8z2)(6y8x2z2) (5k27k)(7k23k7) (8a29a b)( a28a2b) 9x2(2x23x2)(5x8) 6y2(5x2y)(7x25y2) ( x23xyx)(6x22xy x) 5 1 1(xy7y24)(x2xy6y24) 5 5 2 5(xyy)(xyx6) 3 6(3y9x4z2)
2、(8y2x6z2) (8k29k)(7k23k6) (2a28a2b)(8a22a6b) 4x2(4x28x7)(2x3) 4y2(7x2y)(6x2 y2) 6(7x2 xyx)(2x28xy2x) 6 1(xy2y24)(x2xy9y26) 7 7 1 1(xyy)(xyx4) 3 7(8y4x6z2)( y x6z2) (9k29k)(6k29k4) (8a2 a2b)(9a28a7b) x2(8x25x2)(2x1) 7y2(5x2y)(2x28y2) (5x29xyx)(4x23xy6x) (xy y23)(x2xy6y28) 7 8(xyy)(xyx1) (3y9x3z2)(6y3x3z2) (7k2 k)(2k29k7) (3a29a4b)(6a2 a7b) 6x2(7x27x9)(3x5) 4y2( x2y)(9x2 y2) (9x29xyx)(3x23xy x) (xy3y21)(x2xy2y24) 3 6 9 9(xyy)(xyx2) 8 8(7y5x6z2)(3y3x z2) (9k26k)(5k23k1) (6a28a3b)(4a25a5b) x2(5x22x4)(4x8)