八年级数学上册单项式乘多项式20.docx

1、八年级数学上册单项式乘多项式20 (4x4)(4x9) 3a(5a9b) (5x2y)(2x) 7 1 (ab32ab)ab3 4x(x2)2x(3x4)x(2x2) 6 7 (2103)(8107) (6ab4)(5a3) (2x)2(3x4y2) 2x28x3 5y(8xy3) (2x)26x2 (4a)3(2a)2 8a2a 4y7y3 (x3)(2x1) 6a(2a8b) (4x5y)(2x) 4 1 (ab22ab)ab2 2x(x4)4x(3x2)x(2x4) 5 4 (2108)(9105) (a2b)(6a4) (4x)3(2x3y4) 2x43x4 7y(4xy) (3x)3

2、2x2 (2a)2(4a)3 7a7a 5y3y (8x3)(4x6) 8a(8a2b) (2x7y)(2x) 5 1 (ab34ab)ab2 x(3x3)3x(x4)x(x4) 6 5 (3102)(2103) (a2b)(9a) (2x)2(3x3y5) 6x7x4 8y(3xy) (4x)35x2 (4a)3(3a)3 9a9a 9y23y3 (x4)(8x2) 4a(3a9b) (6x5y)(4x) 6 1 (ab22ab)ab3 x(3x3)x(3x4)2x(x4) 5 6 (5102)(5108) (ab)(6a) (2x)2(3x4y5) 2x49x2 7y(7x3y3) (2x

3、)23x2 (3a)2(2a)3 4a25a3 7y8y (x4)(5x9) 5a(4a9b) (3x4y)(8x) 3 1 (ab25ab)ab 3x(2x1)x(x4)3x(2x3) 4 3 (6107)(3107) (a2b4)(5a3) (4x)3(4x2y4) 6x47x 6y4(6x3y) (2x)39x2 (4a)3(3a)2 6a36a 5y9y4 (x3)(8x8) 6a(7a5b) (2x5y)(6x) 4 1 (ab34ab)ab 3x(x1)x(4x2)x(x1) 5 4 (9107)(6109) (8a2b)(4a2) (4x)3(3x4y2) 8x4x 8y4(4x

4、3y2) (4x)29x3 (4a)2(3a)2 6a9a 6y5y (x3)(8x9) 8a(7a9b) (4x5y)(8x) 4 1 (ab35ab)ab3 x(3x1)x(x1)4x(4x1) 5 4 (2106)(4107) (ab)(5a3) (2x)3(2x4y3) 3x33x 6y4(2xy) (4x)27x2 (4a)2(4a)2 7a2a 3y23y2 (x3)(3x6) 8a(8a9b) (7x9y)(2x) 6 1 (ab32ab)ab2 3x(3x4)4x(4x3)x(x1) 5 6 (2109)(5104) (a4b)(9a2) (4x)3(2x3y5) 7x32x2

5、 9y3(4xy2) (3x)23x2 (3a)3(3a)3 5a5a 6y4y3 (x4)(2x4) 7a(4a9b) (6x7y)(3x) 5 1 (ab35ab)ab3 x(x4)x(x2)2x(x1) 6 5 (8104)(9106) (a2b2)(3a2) (4x)2(2x4y5) 2x8x3 7y(4xy4) (4x)24x4 (2a)3(3a)2 5a6a 5y28y3 (4x2)(8x2) 7a(6a3b) (9x3y)(5x) 4 1 (ab35ab)ab2 x(3x2)x(2x4)3x(x1) 3 4 (9106)(9104) (3ab)(8a2) (4x)3(2x3y4)

6、 9x46x3 6y4(9x4y) (2x)24x2 (2a)3(2a)2 3a2a 2y4y2 (x3)(9x4) 5a(3a5b) (2x8y)(4x) 3 1 (ab24ab)ab2 2x(2x4)2x(x4)x(3x4) 4 3 (6106)(5102) (ab3)(8a) (2x)2(3x3y5) 4x43x3 7y3(9xy) (2x)33x4 (2a)3(2a)3 4a27a4 6y9y (2x3)(2x8) 9a(8a8b) (4x7y)(8x) 3 1 (ab35ab)ab x(x2)x(3x3)3x(x4) 4 3 (3109)(2104) (a4b2)(3a) (4x)2

7、(4x2y2) 8x46x 2y3(6x4y2) (3x)36x4 (3a)2(3a)2 4a8a3 3y36y3 (x3)(3x4) 2a(3a4b) (8x7y)(4x) 7 1 (ab33ab)ab 3x(2x2)x(4x2)x(x1) 6 7 (6105)(6106) (2ab)(3a) (2x)3(2x4y3) 7x7x4 9y(9x3y3) (2x)39x4 (4a)3(2a)3 7a38a2 5y9y2 (4x2)(5x6) 5a(6a2b) (2x9y)(5x) 5 1 (ab36ab)ab3 2x(3x4)2x(x3)x(x1) 6 5 (9107)(6109) (a3b2)

8、(3a) (2x)2(4x4y2) 4x37x4 3y2(8x4y) (2x)23x4 (3a)2(2a)3 4a7a 6y6y (5x4)(7x9) 2a(9a8b) (5x4y)(2x) 3 1 (ab34ab)ab 3x(x1)x(x1)x(2x3) 4 3 (4102)(2103) (ab3)(6a) (4x)2(2x2y5) 7x47x 5y(6x3y) (4x)33x3 (3a)3(4a)2 4a6a 4y2y3 (8x4)(4x1) 5a(8a8b) (3x3y)(9x) 2 1 (ab33ab)ab 3x(x1)2x(2x1)x(x3) 3 2 (3105)(6106) (8a

9、b4)(6a) (2x)2(4x4y5) 9x6x3 3y(6xy2) (2x)34x3 (2a)3(4a)3 9a2a2 4y27y (3x2)(7x6) 9a(2a5b) (7x6y)(7x) 4 1 (ab26ab)ab 2x(x4)x(x4)x(x3) 3 4 (6106)(4105) (4ab3)(6a) (4x)3(3x3y2) 3x6x 9y4(4xy3) (4x)24x2 (2a)3(3a)3 9a2a 6y43y2 (5x3)(9x8) 3a(6a3b) (4x2y)(6x) 6 1 (ab35ab)ab2 x(3x2)x(2x1)4x(2x3) 5 6 (3107)(910

10、5) (9ab4)(2a3) (2x)2(2x3y3) 8x2x4 3y(8xy) (2x)23x4 (2a)2(2a)3 9a45a3 3y24y (8x4)(3x9) 8a(3a2b) (5x5y)(2x) 3 1 (ab35ab)ab2 3x(2x1)x(x2)x(3x1) 4 3 (9109)(5104) (a2b)(4a2) (3x)3(2x4y5) 6x5x3 5y3(3xy4) (2x)36x4 (2a)2(3a)2 9a8a 3y43y2 (x3)(3x2) 7a(5a6b) (8x6y)(9x) 5 1 (ab32ab)ab3 4x(x1)x(x3)x(x3) 6 5 (7107)(2107) (2ab2)(6a) (3x)2(4x4y5) 8x44x 4y2(6xy) (4x)24x2 (3a)3(3a)2 2a25a 6y6y