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1、 (1) (2)(3)4y(-2xy3);(4) (5)(6)(7)(8)(9)10)(1) (2)(3)(4)(5)(6)(7) (8)(1) (2)(3)(4)(5)(6)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
2、)13(4a3+12a2b7a3b3)(4a2)14计算:xy2(3x2yxy2+y) 15(2ab)(3a22ab4b2)1 23. 45. 67 8(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
3、)(x+7y)8、(2xy)(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)(1)(2x3y)(3x2y) (2) (3x
4、1)(4x5)(3)(x3)(x4)(x1)(x2) (4)(3x2y)(2x3y)(x3y)(3x4y)(5)(x2)(x3)(x6)(x1) (1 )(m1)(2m1)(2) (2a3b)(3a2b)(3) (2x3y)(4x26xy9y2)(1) (ab)(ab22abb1)(2) 3ab(a2bab2ab)ab2(2a23ab2a)(4) (2xy)(xy)(5) a(a3)(2a)(2a) 因式分解因式分解3x36x4 4a3b210ab3c 3ma36ma212ma; 6p(pq)4q(pq)x4x3x x(xy)y(yx) 6x(ab)4y(ba) (a2ab)c(ab)(13)
5、4q(1p)32(p1)24x2y2;16a2b2100x29y2(x2y)2(xy)216b4a39a3m(2xy)23mn2;(ab)b24(ab) 3p26pq;2x2+8x+82am28a;4x3+4x2y+xy2 24x312x228x 6(mn)312(nm)2 3(ab)26(ba)18(ab)312b(ba)2(2ab)(2a3b)3a(2ab) (x26x)2(2x4)29(mn)2(mn)2 39. (2x3y)21 40. 9(ab)216(ab)2(xy)216(xy)2 16x481y4 3ax23ay2 2x38x 7x263 (a2b2)24a2b2(mn)26(mn)9 (3)(ab)22(ab)1 4xy24x2yy3x24y24xy (a24)216a2 -4x3+16x2-26xa2(x-2a)2-a(2a-x)3x3yz+14x2y2z21xy2z2 mn(mn)m(nm) -(2a-b)2+4(a -b)24xy(x2-4y2)-3ma3+6ma2-12ma a2(x-y)+b2(y-x) 2x2n-4xnax2y2+2axy+2a (x2-6x)2+18(x2-6x)+819x2y24y4 20 / 20