七年级数学下册平方差公式专项训练 19Word文档下载推荐.docx
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2x(x+8)-(x-1)(x+1)(4m+8)(4m-8)
x(x-6)+(2-x)(2+x)(9x-y)(9x+y)-4y(x+y)
(a+—b)(a-—b)-(5a-2b)(5a+2b)506×
494
55
(9x-y)(9x+y)+3y(x+y)a2(3a+4b)(3a-4b)-a2b2
(5x+4)(5x-4)+5x(5x-7)(8x+2y)(8x-2y)+(8x+9)(8x-9)
4x(x-1)-(x-1)(x+1)(5m+5)(5m-5)
x(x-6)-(4-x)(4+x)(6x-y)(6x+y)-5y(x+y)
(a+—b)(a-—b)+(4a-5b)(4a+5b)505×
495
22
(5x-y)(5x+y)+5y(x-y)a2(5a+5b)(5a-5b)-a2b2
(2x+2)(2x-2)+2x(2x+8)(x+3y)(x-3y)+(x+3)(x-3)
6x(x+4)+(x-4)(x+4)(7m+5)(7m-5)
x(x-6)-(7-x)(7+x)(x-y)(x+y)+5y(x-y)
(a+—b)(a-—b)-(3a-b)(3a+b)906×
894
(2x-y)(2x+y)-5y(x-y)a2(7a+3b)(7a-3b)-a2b2
(6x+4)(6x-4)+6x(6x+7)(5x+6y)(5x-6y)-(5x+7)(5x-7)
2x(x+2)-(x-5)(x+5)(4m+5)(4m-5)
x(x-4)+(3-x)(3+x)(4x-y)(4x+y)+2y(x-y)
(a+—b)(a-—b)-(a-4b)(a+4b)802×
798
(9x-y)(9x+y)+4y(x-y)a2(7a+8b)(7a-8b)-a2b2
(5x+8)(5x-8)+5x(5x-3)(3x+5y)(3x-5y)+(3x+2)(3x-2)
6x(x-1)-(x-2)(x+2)(2m+1)(2m-1)
x(x-10)-(7-x)(7+x)(9x-y)(9x+y)+3y(x+y)
(a+—b)(a-—b)+(2a-b)(2a+b)603×
597
(7x-y)(7x+y)-2y(x+y)a2(a+5b)(a-5b)-a2b2
(9x+8)(9x-8)-9x(9x-6)(9x+7y)(9x-7y)+(9x+5)(9x-5)
4x(x+2)+(x-2)(x+2)(9m+5)(9m-5)
x(x-2)+(1-x)(1+x)(8x-y)(8x+y)-3y(x-y)
(a+—b)(a-—b)-(3a-5b)(3a+5b)305×
295
(3x-y)(3x+y)-5y(x+y)a2(6a+8b)(6a-8b)+a2b2
(6x+7)(6x-7)-6x(6x-5)(x+5y)(x-5y)+(x+9)(x-9)
5x(x+9)-(x-3)(x+3)(8m+8)(8m-8)
x(x+4)+(8-x)(8+x)(8x-y)(8x+y)-2y(x-y)
(a+—b)(a-—b)-(3a-4b)(3a+4b)708×
692
(8x-y)(8x+y)+2y(x+y)a2(2a+2b)(2a-2b)-a2b2
(x+4)(x-4)+x(x-5)(6x+6y)(6x-6y)+(6x+4)(6x-4)
4x(x+3)+(x-2)(x+2)(3m+8)(3m-8)
x(x-10)-(1-x)(1+x)(9x-y)(9x+y)-5y(x+y)
(a+—b)(a-—b)+(2a-5b)(2a+5b)907×
893
(3x-y)(3x+y)-3y(x-y)a2(7a+5b)(7a-5b)-a2b2
(4x+6)(4x-6)-4x(4x-9)(5x+3y)(5x-3y)+(5x+4)(5x-4)
2x(x+6)+(x-4)(x+4)(8m+1)(8m-1)
x(x+8)+(8-x)(8+x)(2x-y)(2x+y)-2y(x-y)
(a+—b)(a-—b)-(3a-b)(3a+b)1004×
996
33
(9x-y)(9x+y)+3y(x+y)a2(a+2b)(a-2b)-a2b2
(6x+6)(6x-6)-6x(6x+2)(4x+2y)(4x-2y)+(4x+9)(4x-9)
2x(x-9)+(x-5)(x+5)(9m+8)(9m-8)
x(x+2)+(9-x)(9+x)(9x-y)(9x+y)-4y(x-y)
(a+—b)(a-—b)-(a-2b)(a+2b)302×
298
(6x-y)(6x+y)+3y(x-y)a2(9a+b)(9a-b)+a2b2
(x+7)(x-7)-x(x-5)(8x+6y)(8x-6y)+(8x+9)(8x-9)
2x(x+6)+(x-4)(x+4)(8m+2)(8m-2)
x(x+4)-(3-x)(3+x)(3x-y)(3x+y)+4y(x-y)
(a+—b)(a-—b)+(2a-2b)(2a+2b)702×
698
(4x-y)(4x+y)-5y(x+y)a2(9a+8b)(9a-8b)+a2b2
(3x+8)(3x-8)+3x(3x-8)(4x+7y)(4x-7y)-(4x+8)(4x-8)
3x(x-6)-(x-2)(x+2)(3m+8)(3m-8)
x(x-3)-(8-x)(8+x)(7x-y)(7x+y)-5y(x+y)
(a+—b)(a-—b)-(5a-5b)(5a+5b)806×
794
(9x-y)(9x+y)-4y(x+y)a2(5a+9b)(5a-9b)-a2b2
(9x+6)(9x-6)-9x(9x-8)(6x+5y)(6x-5y)+(6x+2)(6x-2)
2x(x+1)+(x-4)(x+4)(9m+2)(9m-2)
x(x+4)+(8-x)(8+x)(6x-y)(6x+y)-3y(x-y)
(a+—b)(a-—b)-(2a-5b)(2a+5b)906×
(5x-y)(5x+y)+3y(x-y)a2(2a+4b)(2a-4b)+a2b2
(6x+5)(6x-5)+6x(6x+9)(6x+7y)(6x-7y)+(6x+9)(6x-9)
5x(x-8)-(x-2)(x+2)(6m+8)(6m-8)
x(x+4)+(9-x)(9+x)(3x-y)(3x+y)-2y(x+y)
(a+—b)(a-—b)+(4a-b)(4a+b)502×
498
(4x-y)(4x+y)-5y(x+y)a2(2a+8b)(2a-8b)+a2b2
(4x+4)(4x-4)+4x(4x-2)(3x+9y)(3x-9y)-(3x+4)(3x-4)
3x(x-3)+(x-3)(x+3)(3m+8)(3m-8)
x(x+1)+(4-x)(4+x)(8x-y)(8x+y)-2y(x+y)
(a+—b)(a-—b)-(a-4b)(a+4b)102×
98
(6x-y)(6x+y)+5y(x-y)a2(6a+3b)(6a-3b)-a2b2
(8x+8)(8x-8)-8x(8x-3)(4x+8y)(4x-8y)-(4x+8)(4x-8)
3x(x+3)-(x-5)(x+5)(5m+5)(5m-5)
x(x-10)+(1-x)(1+x)(7x-y)(7x+y)-2y(x+y)
(a+—b)(a-—b)-(2a-3b)(2a+3b)203×
197
(3x-y)(3x+y)+5y(x+y)a2(9a+9b)(9a-9b)+a2b2
(4x+6)(4x-6)-4x(4x+5)(9x+5y)(9x-5y)+(9x+7)(9x-7)
5x(x-2)+(x-1)(x+1)(2m+6)(2m-6)
x(x+9)-(5-x)(5+x)(7x-y)(7x+y)-5y(x-y)
(a+—b)(a-—b)+(a-2b)(a+2b)107×
93
(3x-y)(3x+y)+3y(x-y)a2(8a+4b)(8a-4b)+a2b2
(6x+8)(6x-8)+6x(6x+2)(7x+6y)(7x-6y)+(7x+4)(7x-4)
6x(x+1)-(x-5)(x+5)(2m+2)(2m-2)
x(x+9)-(4-x)(4+x)(8x-y)(8x+y)+5y(x-y)
(a+—b)(a-—b)-(2a-2b)(2a+2b)901×
899
(4x-y)(4x+y)-5y(x-y)a2(3a+8b)(3a-8b)-a2b2