1、(5x28xyx)( x2 xy4x) 5 1 5(xy5y29)(x2xy6y23) 7 4 1 8(xyy)(xyx8) 3 7(7y7x z2)(4y3x7z2) ( m23m6)(8m8n2) (4x2 x4)5(7x22x) 5(x22)7(x22) (x2y2xy9)9(x2y6xy9) 7 1(x219x17y)(x219x21y) 6 6 1 1(2k37k24)(9k37k26k) 6 2(5k26k)(6k22k9) (2a25a3b)(8a23a4b) 7x2(2x24x8)(5x6) 7y2(3x2y)(4x26y2) 7(9x26xyx)(9x27xy5x) 8(xy
2、 y27)(x2xy7y23) 5 8 9 9(xyy)(xyx9) 8 8(2y8x5z2)(2y9x9z2) (5m23m6)(6m4n1) (9x23x4)7(5x28x) 6(x28)8(x25) (x2y3xy5)3(x2y8xy9) 5 7(x210x14y)(x211x13y) ( k37k29)(2k39k21k) 4 3(5k28k)(3k28k3) (6a23a6b)(3a29a6b) 8x2(7x26x9)(6x7) y2( x2y)(6x25y2) 4(9x25xyx)(7x22xy4x) 3 5 1(xy4y26)(x2xy8y25) 4 8 4 5(xyy)(xyx6) 5 6(2y x8z2)(5y5x z2) (2m22m5)(2m n6) (9x27x1)7(8x25x) 4(x23)5(x21) (x2y7xy2)6(x2y8xy4) (x215x16y)(x212x28y) 3 3(4k36k26)(3k37k26k) 4 4(7k28k)(8k24k9) (6a22a4b)(5a2 a7b) 4x2(8x25x9)(4x3)