1、(15) (16)(17) (18)(19) (20)(21) (22)(23) (24)单项式乘多项式(1) (2xy23xy)2xy; (2) x(2x3x22); (3) 2ab(ab3ab21); (4) (an1)ab. (5) -10mn(2m2n-3mn2). (6) (-4ax)2(5a2-3ax2).(7)(3x2y-2xy2)(-3x3y2)2. (8)7a(2ab2-3b). (9)x(x2-1)+2x2(x+1)-3x(2x-5)102ab(5ab+3a2b) 11.12计算:2x(x2x+3) 13(4a3+12a2b7a3b3)(4a2)14计算:xy2(3x2yx
2、y2+y) 15(2ab)(3a22ab4b2)16 1718. 1920. 2122 23(三)同底数幂的除法(1)(a)8(a5); (2)(xy)7(yx)6; (3)(m4)3(m)7; (4)x7(x5x3)(1) (a2b4)(ab2)(10ab); (2) 32a4b5c(2ab)3(ac);(3) (n37mn2n5)n2; (4) (12x4y68x2y416x3y5)4x2y3.多项式与多项式相乘1、(x2)(x6) 2、(x5)(x6) 3、(x5)(x7) 4、(x+2)(x3)5、(x2)(x6) 6、(x5y)(x7y) 7、(x3y)(x+7y) 8、(2xy)(
3、3x2y)9、(3x1)(2x+1) 10、(2x3)(3x4) 11、(3x+2y)(3x4y) 12、(-8x+5) (5x- 4)13、(4xy)(5x2y) 14、(-2a3b)(4a2b) 15、(2x3y)(4x26xy9y2)16、(a22)(a42a24) 17、(3x22x1)(2x23x1)18、(y1)(y2)(y3) 19、(a4)(a+3) (2 a+1)(a3)20、(x+2)(x3)x(x2) 21(x3)(x2一6x+1)x(x2一x3) 22 (a2b)2(ab)(ab)2(a3b)(ab) (23)(2x3y)(3x2y) (24) (3x1)(4x5)(2
4、5)(x3)(x4)(x1)(x2) (26)(3x2y)(2x3y)(x3y)(3x4y)(27)(x2)(x3)(x6)(x1) (28)(m1)(2m1) (29) (2a3b)(3a2b)(30) (2x3y)(4x26xy9y2) (31) (ab)(ab22abb1)(32) 3ab(a2bab2ab)ab2(2a23ab2a) (33) (2xy)(xy)(34) a(a3)(2a)(2a) 因式分解(1) (2) (3) (4)(5)3x36x4 (6)4a3b210ab3c (7) 3ma36ma212ma; (8) 6p(pq)4q(pq)(9)x4x3x (10)x(xy
5、)y(yx) (11) 6x(ab)4y(ba) (12) (a2ab)c(ab)(13)4q(1p)32(p1)2 (14) (15) (16) (17) (18) 4x2y2; (19) 16a2b2100x29y2 (20)(x2y)2(xy)2 (21) 16b4 (22) a39a(23)3m(2xy)23mn2; (24) (ab)b24(ab) (25) (26) (27) (28) (29)3p26pq; (29) 2x2+8x+8 (30)2am28a; (31) 4x3+4x2y+xy2 (32) (33) (34) (35) (36) (37) (38)24x312x22
6、8x (39) 6(mn)312(nm)2 (40)3(ab)26(ba) (41)18(ab)312b(ba)2 (42) (2ab)(2a3b)3a(2ab) (44)(x26x)2(2x4)2 (44)9(mn)2(mn)2 (45) (2x3y)21 (46)9(ab)216(ab)2 (47)(xy)216(xy)2 (48)16x481y4 (49)3ax23ay2 2x38x (50) 7x263 (51) (a2b2)24a2b2(52)(mn)26(mn)9 (53) (ab)22(ab)1 (54) 4xy24x2yy3(55)x24y24xy (56) (57) (58)
7、(a24)216a2 (59)-4x3+16x2-26x (60) a2(x-2a)2-a(2a-x)3(61)x3yz+14x2y2z21xy2z2 (62)mn(mn)m(nm) (63) -(2a-b)2+4(a -b)2(64)4xy(x2-4y2) (65) -3ma3+6ma2-12ma (66) a2(x-y)+b2(y-x)(67) (68) (69) 2x2n-4xn(70) (71) (72) (73)ax2y2+2axy+2a (74) (x2-6x)2+18(x2-6x)+81 (75) (76)9x2y24y4 (77) (78) (79) (80) (81) (82) (83)
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