七年级数学下册平方差公式专项训练 4.docx
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七年级数学下册平方差公式专项训练 4.docx
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七年级数学下册平方差公式专项训练4
(2x+4)(2x-4)+2x(2x+1)(5x+y)(5x-y)-(5x+6)(5x-6)
4x(x+4)+(x-2)(x+2)(5m+3)(5m-3)
x(x+8)-(8-x)(8+x)(2x-y)(2x+y)+3y(x+y)
11
(a+—b)(a-—b)-(3a-3b)(3a+3b)404×396
22
(4x-y)(4x+y)-2y(x+y)a2(4a+b)(4a-b)-a2b2
(4x+1)(4x-1)+4x(4x-4)(6x+5y)(6x-5y)-(6x+3)(6x-3)
5x(x+8)-(x-5)(x+5)(5m+2)(5m-2)
x(x+9)+(8-x)(8+x)(8x-y)(8x+y)+5y(x-y)
11
(a+—b)(a-—b)+(5a-5b)(5a+5b)404×396
44
(3x-y)(3x+y)+5y(x+y)a2(9a+b)(9a-b)+a2b2
(9x+5)(9x-5)-9x(9x+8)(x+2y)(x-2y)-(x+8)(x-8)
3x(x-7)-(x-2)(x+2)(9m+3)(9m-3)
x(x+4)+(5-x)(5+x)(4x-y)(4x+y)-4y(x-y)
11
(a+—b)(a-—b)+(4a-2b)(4a+2b)401×399
55
(9x-y)(9x+y)-2y(x-y)a2(5a+8b)(5a-8b)-a2b2
(3x+1)(3x-1)+3x(3x+2)(6x+2y)(6x-2y)-(6x+6)(6x-6)
3x(x-1)-(x-2)(x+2)(3m+4)(3m-4)
x(x+4)+(8-x)(8+x)(5x-y)(5x+y)-4y(x+y)
11
(a+—b)(a-—b)-(a-5b)(a+5b)606×594
55
(4x-y)(4x+y)+3y(x+y)a2(4a+5b)(4a-5b)+a2b2
(6x+1)(6x-1)+6x(6x-1)(3x+2y)(3x-2y)-(3x+1)(3x-1)
6x(x+4)+(x-5)(x+5)(9m+4)(9m-4)
x(x+6)-(5-x)(5+x)(5x-y)(5x+y)-3y(x-y)
11
(a+—b)(a-—b)-(3a-5b)(3a+5b)202×198
33
(3x-y)(3x+y)-5y(x+y)a2(7a+2b)(7a-2b)-a2b2
(2x+2)(2x-2)-2x(2x-2)(5x+y)(5x-y)-(5x+1)(5x-1)
4x(x-7)+(x-3)(x+3)(9m+1)(9m-1)
x(x+10)-(6-x)(6+x)(5x-y)(5x+y)+4y(x+y)
11
(a+—b)(a-—b)+(2a-b)(2a+b)609×591
22
(6x-y)(6x+y)-2y(x+y)a2(4a+9b)(4a-9b)+a2b2
(3x+2)(3x-2)+3x(3x-1)(5x+2y)(5x-2y)-(5x+6)(5x-6)
6x(x+8)-(x-4)(x+4)(9m+2)(9m-2)
x(x-3)-(5-x)(5+x)(9x-y)(9x+y)-4y(x-y)
11
(a+—b)(a-—b)+(a-2b)(a+2b)605×595
22
(5x-y)(5x+y)-3y(x-y)a2(2a+3b)(2a-3b)-a2b2
(5x+7)(5x-7)-5x(5x+8)(4x+6y)(4x-6y)-(4x+3)(4x-3)
2x(x-7)+(x-1)(x+1)(8m+2)(8m-2)
x(x+1)+(9-x)(9+x)(9x-y)(9x+y)+5y(x+y)
11
(a+—b)(a-—b)+(5a-2b)(5a+2b)602×598
55
(9x-y)(9x+y)-5y(x-y)a2(6a+2b)(6a-2b)-a2b2
(6x+9)(6x-9)+6x(6x-9)(4x+2y)(4x-2y)+(4x+5)(4x-5)
3x(x+2)-(x-2)(x+2)(2m+4)(2m-4)
x(x-6)-(5-x)(5+x)(9x-y)(9x+y)-2y(x+y)
11
(a+—b)(a-—b)+(3a-3b)(3a+3b)201×199
44
(8x-y)(8x+y)-4y(x-y)a2(3a+3b)(3a-3b)-a2b2
(9x+9)(9x-9)+9x(9x+7)(6x+3y)(6x-3y)+(6x+6)(6x-6)
2x(x+2)+(x-3)(x+3)(9m+2)(9m-2)
x(x+9)+(1-x)(1+x)(6x-y)(6x+y)+5y(x-y)
11
(a+—b)(a-—b)+(4a-2b)(4a+2b)207×193
55
(2x-y)(2x+y)+4y(x+y)a2(3a+5b)(3a-5b)-a2b2
(4x+6)(4x-6)+4x(4x-6)(8x+5y)(8x-5y)+(8x+3)(8x-3)
6x(x+5)+(x-5)(x+5)(5m+5)(5m-5)
x(x+6)-(5-x)(5+x)(2x-y)(2x+y)+3y(x+y)
11
(a+—b)(a-—b)+(3a-b)(3a+b)908×892
22
(9x-y)(9x+y)+2y(x+y)a2(8a+5b)(8a-5b)-a2b2
(5x+3)(5x-3)-5x(5x-5)(7x+4y)(7x-4y)-(7x+4)(7x-4)
6x(x-7)+(x-4)(x+4)(6m+2)(6m-2)
x(x+5)-(9-x)(9+x)(6x-y)(6x+y)+3y(x-y)
11
(a+—b)(a-—b)-(3a-5b)(3a+5b)504×496
22
(7x-y)(7x+y)+5y(x+y)a2(4a+b)(4a-b)+a2b2
(9x+6)(9x-6)+9x(9x+5)(x+4y)(x-4y)-(x+3)(x-3)
4x(x-5)-(x-2)(x+2)(7m+5)(7m-5)
x(x-2)+(5-x)(5+x)(9x-y)(9x+y)+5y(x-y)
11
(a+—b)(a-—b)+(a-b)(a+b)905×895
44
(9x-y)(9x+y)-5y(x-y)a2(2a+6b)(2a-6b)+a2b2
(6x+1)(6x-1)+6x(6x-7)(9x+9y)(9x-9y)-(9x+5)(9x-5)
4x(x-1)-(x-2)(x+2)(6m+8)(6m-8)
x(x-9)+(7-x)(7+x)(5x-y)(5x+y)+2y(x-y)
11
(a+—b)(a-—b)+(2a-5b)(2a+5b)504×496
22
(8x-y)(8x+y)-2y(x+y)a2(5a+7b)(5a-7b)-a2b2
(6x+7)(6x-7)-6x(6x-5)(6x+7y)(6x-7y)+(6x+5)(6x-5)
5x(x+6)+(x-5)(x+5)(7m+4)(7m-4)
x(x-5)-(2-x)(2+x)(6x-y)(6x+y)+2y(x-y)
11
(a+—b)(a-—b)+(4a-4b)(4a+4b)607×593
33
(9x-y)(9x+y)+2y(x+y)a2(9a+3b)(9a-3b)+a2b2
(2x+2)(2x-2)+2x(2x+1)(6x+7y)(6x-7y)-(6x+4)(6x-4)
3x(x+3)-(x-3)(x+3)(5m+8)(5m-8)
x(x-6)+(6-x)(6+x)(2x-y)(2x+y)+5y(x-y)
11
(a+—b)(a-—b)+(3a-4b)(3a+4b)804×796
22
(x-y)(x+y)+5y(x-y)a2(9a+b)(9a-b)+a2b2
(2x+8)(2x-8)-2x(2x+4)(4x+7y)(4x-7y)-(4x+4)(4x-4)
6x(x+1)-(x-3)(x+3)(5m+7)(5m-7)
x(x+1)+(2-x)(2+x)(8x-y)(8x+y)-2y(x+y)
11
(a+—b)(a-—b)+(2a-5b)(2a+5b)902×898
22
(3x-y)(3x+y)+3y(x-y)a2(7a+2b)(7a-2b)+a2b2
(3x+9)(3x-9)+3x(3x-3)(3x+4y)(3x-4y)+(3x+8)(3x-8)
3x(x+6)+(x-5)(x+5)(2m+2)(2m-2)
x(x+2)+(1-x)(1+x)(5x-y)(5x+y)-3y(x+y)
11
(a+—b)(a-—b)+(a-4b)(a+4b)201×199
44
(x-y)(x+y)-5y(x-y)a2(6a+8b)(6a-8b)-a2b2
(6x+9)(6x-9)-6x(6x+4)(4x+3y)(4x-3y)+(4x+6)(4x-6)
6x(x+9)+(x-3)(x+3)(6m+4)(6m-4)
x(x-5)-(2-x)(2+x)(2x-y)(2x+y)-5y(x-y)
11
(a+—b)(a-—b)+(2a-3b)(2a+3b)801×799
55
(x-y)(x+y)+3y(x+y)a2(2a+5b)(2a-5b)+a2b2
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