1、 6 7 1(xy y28)(x2xy9y22) 8 6 1 2(xyy)(xyx8) 3 3(5y5x7z2)(9y7x2z2) (7m26m2)(7m6n3) (2x26x3)7(2x29x) 4(x28)7(x29) (x2y8xy7)8(x2y4xy6) 8 1(x226x13y)(x219x20y) 7 7 1 1(8k39k21)(8k3 k24k) 6 6(6k23k)(3k25k4) ( a26a6b)(6a24a5b) 8x2(9x24x4)(7x2) y2(3x2y)(8x2 y2) (4x22xyx)( x24xy2x) 7(xy5y29)(x2xy7y22) 4 5 1
2、 1(xyy)(xyx3) 7 5(3y3x2z2)(7y8x2z2) (2m24m3)(6m4n5) (5x23x5)3(9x22x) 4(x29)9(x27) (x2y6xy2)9(x2y8xy5) 2 1(x222x11y)(x213x23y) 3 3(6k39k28)(5k3 k29k) 2 5(3k26k)(2k24k2) (6a26a4b)(2a2 a b) 3x2(9x26x3)( x7) 8y2(8x2y)(5x28y2) (5x24xyx)(2x26xy5x) 5 1 6(xy6y23)(x2xy3y25) 4 7 9 1(xyy)(xyx7) 8 5(7y x3z2)(3y2x5z2) (9m22m5)(8m n7) ( x23x4)9(9x25x) 7(x29)2(x26) (x2y6xy7)6(x2y2xy5) 5 1(x218x13y)(x219x13y) (9k35k25)(9k33k24k) 6 5(4k24k)(5k29k6) (7a24a3b)(4a25a8b) 7x2(5x29x8)(4x2) 7y2(8x2y)( x27y2)