1、(4x29xyx)(5x22xy6x) 8 1 5(xy7y22)(x2xy y28) 8 4 1 1(xyy)(xyx5) 5 5(8y x3z2)(4y8x3z2) (2k23k)(7k22k2) (7a23a9b)(6a27a2b) x2(5x29x1)(5x2) 5y2(6x2y)(9x24y2) 4(8x24xyx)(9x27xy3x) 3 7 1(xy6y28)(x2xy3y29) 8 3 6 1(xyy)(xyx7) 7 5( y x9z2)( y2x8z2) ( k23k)(3k26k3) (9a27a3b)(5a26a6b) 7x2(6x27x4)(4x5) 2y2(7x2y
2、)(5x28y2) 1(7x29xyx)(4x23xy9x) 3 1(xy6y27)(x2xy6y26) 4 7(xyy)(xyx7) 7 8(3y7x4z2)(5y2x7z2) (7k28k)(8k22k3) (9a27a8b)(5a24a6b) 4x2(8x26x2)(5x3) 3y2(8x2y)(2x26y2) (5x29xyx)(3x27xy x) 5 1 1(xy y24)(x2xy4y28) 6 3(xyy)(xyx2) 5 3(5y9x8z2)(6y9x z2) (6k28k)(6k23k3) (8a24a8b)(8a24a6b) 8x2(3x29x9)(8x5) 6y2(8x2y)(8x26y2) 6(3x26xyx)(4x23xy8x) 7 7 7(xy7y29)(x2xy3y25) 8 8 4 5(xyy)(xyx3) 3 6(3y2x7z2)(9y x8z2) (2k25k)(8k25k3) (6a28a b)(8a22a b) 6x2(9x27x8)(8x7) 9y2(8x2y)(9x27y2) ( x26xyx)(2x27xy3x)