七年级数学下册平方差公式专项训练 6.docx

1、七年级数学下册平方差公式专项训练 6 (2x6)(2x6)2x(2x8) (2x3y)(2x3y)(2x7)(2x7) 3x(x3)(x4)(x4) (5m5)(5m5) x(x8)(8x)(8x) (8xy)(8xy)3y(xy) 1 1 (ab)(ab)(ab)(ab) 901 899 4 4 (4xy)(4xy)4y(xy) a2(2a5b)(2a5b)a2b2 (8x7)(8x7)8x(8x8) (6x2y)(6x2y)(6x8)(6x8) 5x(x3)(x1)(x1) (4m9)(4m9) x(x10)(9x)(9x) (7xy)(7xy)4y(xy) 1 1 (ab)(ab)(ab

2、)(ab) 1006 994 2 2 (3xy)(3xy)2y(xy) a2(6a2b)(6a2b)a2b2 (7x9)(7x9)7x(7x6) (8xy)(8xy)(8x7)(8x7) 5x(x7)(x4)(x4) (9m1)(9m1) x(x2)(8x)(8x) (9xy)(9xy)4y(xy) 1 1 (ab)(ab)(a2b)(a2b) 302 298 4 4 (6xy)(6xy)2y(xy) a2(3a6b)(3a6b)a2b2 (x6)(x6)x(x7) (2x4y)(2x4y)(2x6)(2x6) 2x(x7)(x5)(x5) (6m4)(6m4) x(x8)(3x)(3x) (

3、4xy)(4xy)5y(xy) 1 1 (ab)(ab)(4a4b)(4a4b) 209 191 4 4 (3xy)(3xy)4y(xy) a2(3a2b)(3a2b)a2b2 (5x6)(5x6)5x(5x3) (2x4y)(2x4y)(2x5)(2x5) 2x(x4)(x5)(x5) (4m6)(4m6) x(x4)(1x)(1x) (6xy)(6xy)2y(xy) 1 1 (ab)(ab)(2a2b)(2a2b) 809 791 4 4 (9xy)(9xy)4y(xy) a2(6a3b)(6a3b)a2b2 (x3)(x3)x(x8) (xy)(xy)(x3)(x3) 6x(x7)(x4

4、)(x4) (m7)(m7) x(x5)(7x)(7x) (7xy)(7xy)4y(xy) 1 1 (ab)(ab)(ab)(ab) 603 597 5 5 (6xy)(6xy)2y(xy) a2(9a5b)(9a5b)a2b2 (x1)(x1)x(x2) (6x7y)(6x7y)(6x1)(6x1) 6x(x4)(x1)(x1) (8m3)(8m3) x(x1)(2x)(2x) (4xy)(4xy)4y(xy) 1 1 (ab)(ab)(ab)(ab) 606 594 5 5 (5xy)(5xy)3y(xy) a2(7a5b)(7a5b)a2b2 (3x9)(3x9)3x(3x9) (7x8

5、y)(7x8y)(7x4)(7x4) 4x(x6)(x3)(x3) (4m5)(4m5) x(x7)(1x)(1x) (9xy)(9xy)3y(xy) 1 1 (ab)(ab)(5a5b)(5a5b) 409 391 5 5 (2xy)(2xy)4y(xy) a2(4a8b)(4a8b)a2b2 (x1)(x1)x(x1) (2xy)(2xy)(2x5)(2x5) 6x(x2)(x3)(x3) (3m9)(3m9) x(x4)(1x)(1x) (2xy)(2xy)2y(xy) 1 1 (ab)(ab)(2ab)(2ab) 109 91 4 4 (9xy)(9xy)4y(xy) a2(2a2b)

6、(2a2b)a2b2 (4x4)(4x4)4x(4x2) (2x7y)(2x7y)(2x3)(2x3) 6x(x3)(x1)(x1) (m6)(m6) x(x7)(9x)(9x) (8xy)(8xy)4y(xy) 1 1 (ab)(ab)(ab)(ab) 102 98 4 4 (3xy)(3xy)3y(xy) a2(3a3b)(3a3b)a2b2 (9x9)(9x9)9x(9x5) (4xy)(4xy)(4x9)(4x9) 6x(x5)(x5)(x5) (9m7)(9m7) x(x8)(7x)(7x) (8xy)(8xy)3y(xy) 1 1 (ab)(ab)(a5b)(a5b) 1004 9

7、96 5 5 (2xy)(2xy)3y(xy) a2(9a7b)(9a7b)a2b2 (7x7)(7x7)7x(7x3) (x8y)(x8y)(x3)(x3) 2x(x8)(x1)(x1) (2m3)(2m3) x(x6)(9x)(9x) (3xy)(3xy)4y(xy) 1 1 (ab)(ab)(2a5b)(2a5b) 205 195 2 2 (2xy)(2xy)2y(xy) a2(8a7b)(8a7b)a2b2 (3x5)(3x5)3x(3x7) (5x8y)(5x8y)(5x7)(5x7) 2x(x4)(x2)(x2) (4m4)(4m4) x(x8)(6x)(6x) (xy)(xy)5

8、y(xy) 1 1 (ab)(ab)(3a3b)(3a3b) 301 299 2 2 (5xy)(5xy)5y(xy) a2(4a8b)(4a8b)a2b2 (2x1)(2x1)2x(2x3) (9x4y)(9x4y)(9x3)(9x3) 3x(x6)(x2)(x2) (3m3)(3m3) x(x8)(7x)(7x) (6xy)(6xy)3y(xy) 1 1 (ab)(ab)(4a3b)(4a3b) 905 895 4 4 (3xy)(3xy)5y(xy) a2(8a2b)(8a2b)a2b2 (4x3)(4x3)4x(4x6) (3x8y)(3x8y)(3x4)(3x4) 4x(x3)(x5

9、)(x5) (8m5)(8m5) x(x9)(6x)(6x) (8xy)(8xy)2y(xy) 1 1 (ab)(ab)(4a4b)(4a4b) 304 296 5 5 (6xy)(6xy)5y(xy) a2(8a5b)(8a5b)a2b2 (8x5)(8x5)8x(8x2) (7x2y)(7x2y)(7x8)(7x8) 6x(x2)(x1)(x1) (7m1)(7m1) x(x5)(3x)(3x) (6xy)(6xy)4y(xy) 1 1 (ab)(ab)(2a2b)(2a2b) 408 392 3 3 (7xy)(7xy)4y(xy) a2(8a5b)(8a5b)a2b2 (4x8)(4x

10、8)4x(4x9) (3x8y)(3x8y)(3x4)(3x4) 3x(x4)(x4)(x4) (3m1)(3m1) x(x4)(6x)(6x) (6xy)(6xy)3y(xy) 1 1 (ab)(ab)(3a4b)(3a4b) 805 795 4 4 (3xy)(3xy)5y(xy) a2(9a6b)(9a6b)a2b2 (8x3)(8x3)8x(8x7) (3x9y)(3x9y)(3x6)(3x6) 4x(x3)(x5)(x5) (3m8)(3m8) x(x9)(2x)(2x) (3xy)(3xy)2y(xy) 1 1 (ab)(ab)(a4b)(a4b) 602 598 3 3 (6xy)(6xy)4y(xy) a2(6a2b)(6a2b)a2b2 (6x8)(6x8)6x(6x2) (4x5y)(4x5y)(4x3)(4x3) 5x(x5)(x3)(x3) (4m6)(4m6) x(x7)(7x)(7x) (xy)(xy)5y(xy) 1 1 (ab)(ab)(4a2b)(4a2b) 903 897 2 2 (5xy)(5xy)2y(xy) a2(a2b)(a2b)a2b2