1、初二数学上册整式的乘法50 (4a)3 (3b)3 (3b)3 (xy2)2 (2x4)2 (ab)2 (3103)3 (3ab3)2 (109)7 (y9)6 (xm)6 (x6)3 (106)7 (x6)2 (an)3 (a8)8a2 xx8 ss5 yy5 (7)(7)5(7)4 x2mx2m+1 x2nx7n-1 1 1 1 ()()5()4 x5x y4y 9 9 9 (10)(10)5(10)7 yy8 aa2 1 1 1 ()6()7()6 x9mx4m+1 y9ny5n-1 6 6 6 (4x2)(9x8) 6a(5a7b) (8x7y)(6x) 2 1 (ab24ab)ab
2、4x(4x4)x(2x4)4x(x2) 3 2 (x2)(4x1) (2xy)(2xy) (2xy)(x2xyy2) (4xy)(xy) (3a2)2 (3a8b)(ab) (x28)(x1) (x2x1)(4x1) (x3)(x3) (x3)(x5) (y1)(y3) (y1)(y1) a9a7 6a3b7(2a2b5) (xy)8(xy)3 (36x9y5)(9x7y2) 14x4y72x2y3 (45106)(9103) 9a9b9c33a2b7 (15a2b321a)3a (18a56a310a)2a (63xy281x3y)9xy (10a)2 (5b)2 (2b)2 (xy5)2
3、(5x3)2 (ab)5 (4103)3 (2ab3)2 (109)3 (a3)8 (xm)4 (a4)6 (104)6 (y3)3 (xm)3 (a9)4a6 xx5 bb9 y4y7 (5)(5)5(5)4 xnx2n-1 xnx4n+1 1 1 1 ()()8()9 t9t b5b4 5 5 5 (5)(5)3(5)5 aa2 tt2 1 1 1 ()2()6()3 ymy2m-1 y7ny5n+1 3 3 3 (4x3)(4x5) 2a(5a6b) (5x2y)(5x) 6 1 (ab24ab)ab 2x(2x3)2x(x1)x(3x1) 5 6 (3x3)(2x2) (4xy)(3x
4、y) (xy)(x2xyy2) (x5y)(xy) (3a1)2 (a4b)(a7b) (4x23)(x8) (2x2x1)(3x2) (x1)(x2) (x2)(x3) (y3)(y2) (y4)(y1) b9b6 42a5b4(6a4b2) (ab)8(ab)6 (21x8y8)(3x2y5) 20x5y74x2y6 (21108)(7104) 3a6b9c25a3b8 (18a3b4a)2a (54a581a236a)9a (6xy324x3y)3xy (9a)2 (6b)2 (2b)3 (xy4)2 (5x3)2 (xy)5 (3103)3 (2ab4)2 (103)6 (x3)9 (
5、bn)4 (a7)7 (105)4 (y4)2 (bn)4 (a8)8a9 xx6 bb6 t3t9 (7)3(7)6(7)5 x6mx7m-1 xnx7n+1 1 1 1 ()5()5()3 b9b b8b 7 7 7 (2)(2)4(2)3 a2a6 a7a9 1 1 1 ()9()4()6 x8mx2m-1 xnx7n+1 5 5 5 (x4)(3x6) 6a(5a7b) (7x3y)(5x) 6 1 (ab36ab)ab 4x(2x4)x(2x2)x(x1) 5 6 (2x7)(4x7) (4xy)(3xy) (3x2y)(x2xyy2) (xy)(4x6y) (a1)2 (3a3b)
6、(2a5b) (4x27)(2x5) (2x23x3)(4x3) (x2)(x1) (x4)(x4) (y4)(y3) (y2)(y3) y7y6 36a3b8(6a2b7) (y)5(y)4 (28x8y9)(7x2y4) 12x6y64x5y4 (63104)(7102) 4a9b3c34a6b2 (32a2b64a)8a (81a418a272a)9a (10xy340xy3)5xy (9a)3 (3b)2 (4b)2 (xy2)4 (4x2)2 (xy)7 (2104)3 (3ab3)2 (104)2 (x3)3 (xm)7 (y8)5 (109)5 (x4)7 (yn)9 (a4)3
7、a3 xx5 x3x4 cc6 (3)(3)6(3)5 xnx3n+1 x6nx2n-1 1 1 1 ()()4()9 z8z9 s4s5 9 9 9 (1)4(1)5(1)9 b9b6 t9t8 1 1 1 ()6()7()7 y8ny5n-1 y3my6m+1 6 6 6 (8x3)(2x3) 5a(6a6b) (8x9y)(9x) 4 1 (ab26ab)ab 4x(2x2)x(2x4)x(x2) 3 4 (2x9)(3x8) (x2y)(4xy) (3x2y)(x2xyy2) (2x8y)(3x4y) (4a2)2 (a9b)(4ab) (4x22)(3x2) (x2x1)(2x1)
8、(x1)(x2) (x2)(x5) (y4)(y2) (y4)(y3) x8x7 8a5b4(4a2b2) (xy)9(xy)3 (35x6y5)(7x4y3) 20x9y45x5y3 (24107)(6106) 4a5b6c46a2b2 (14a2b316a)2a (18a59a227a)3a (49x2y242xy)7xy (5a)2 (4b)2 (2b)3 (xy2)3 (4x4)3 (xy)2 (2104)2 (5ab4)3 (103)5 (b2)3 (yn)3 (x4)6 (109)8 (a8)2 (bn)3 (a6)3a7 x9x5 s8s6 c7c5 (6)5(6)4(6)6 x
9、mx6m-1 xmx5m+1 1 1 1 ()()4()3 t9t3 t4t4 5 5 5 (9)8(9)9(9)5 yy7 yy4 1 1 1 ()()6()3 xnx3n-1 x3nx4n+1 3 3 3 (x2)(5x8) 8a(6a6b) (3x7y)(5x) 4 1 (ab26ab)ab x(4x1)2x(x4)2x(x3) 5 4 (x6)(3x9) (x3y)(x8y) (2xy)(x2xyy2) (x9y)(2x4y) (3a4)2 (4ab)(ab) (x25)(4x3) (2x22x1)(x1) (x1)(x2) (x3)(x3) (y4)(y1) (y1)(y1) a8a4 54a6b7(6a5b5) (xy)7(xy)4 (9x8y5)(3x4y3) 24x4y84x3y5 (72106)(8103) 2a6b5c46a3b2 (12a2b16a)4a (15a512a215a)3a (6xy321xy2)3xy
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