1、 5 6 (5y7x z2)(8y6x7z2) (7k2 k)(5k24k7) (5a24a b)(2a2 a7b) x2(8x23x8)(7x8) y2(8x2y)(9x29y2) 1 (9x26xyx)( x24xy2x) 8 9 1 (xy y28)(x2xy4y27) 1 6 (xyy)(xyx1) 3 7 (2y6x z2)(6y8x2z2) (8k26k)(3k25k1) (6a2 a8b)(3a2 a3b) 4x2(6x22x9)( x7) 7y2(6x2y)(7x2 y2) (2x24xyx)(8x29xy9x) 3 1 2 (xy4y22)(x2xy6y25) 6 3 7 1
2、 (xyy)(xyx7) 6 6 (9y5x8z2)(8y2x3z2) (2k2 k)(4k22k6) (3a25a7b)(5a22a b) 3x2(4x25x2)(2x8) 9y2(9x2y)(7x29y2) (5x29xyx)(6x29xy3x) 4 1 (xy y29)(x2xy9y24) 5 7 1 1 (xyy)(xyx1) 8 7 (5y6x4z2)( y3x2z2) (2k2 k)( k23k2) (6a29a5b)(7a26a8b) 6x2( x27x7)( x2) 7y2(6x2y)(2x29y2) 2 (4x22xyx)(9x23xy6x) 1 1 (xy2y27)(x2xy7y21) 8 6 (xyy)(xyx2) 8 5 (7y4x2z2)( y5x9z2) (6k2 k)( k26k5) (7a24a4b)(8a27a3b) 6x2(5x22x8)(4x8) 2y2(4x2y)( x26y2) (7x27xyx)(8x28xy3x) 6 1 6 (xy6y28)(x2xy6y21) 4 5 3 6 (xyy)(xyx6) 4 5 (4y5x6z2)(8y5x8z2) (5k28k)(5k29k9) (8a2 a5b)(6a2 a7b)