七年级数学下册平方差公式专项训练 25.docx
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七年级数学下册平方差公式专项训练 25.docx
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七年级数学下册平方差公式专项训练25
(3x+8)(3x-8)-3x(3x+9)(5x+2y)(5x-2y)+(5x+3)(5x-3)
4x(x-1)+(x-3)(x+3)(6m+5)(6m-5)
x(x+3)+(8-x)(8+x)(5x-y)(5x+y)+5y(x+y)
11
(a+—b)(a-—b)-(a-5b)(a+5b)606×594
44
(x-y)(x+y)+4y(x+y)a2(2a+7b)(2a-7b)-a2b2
(8x+2)(8x-2)-8x(8x+4)(2x+y)(2x-y)-(2x+2)(2x-2)
2x(x+3)-(x-3)(x+3)(6m+8)(6m-8)
x(x-8)+(5-x)(5+x)(5x-y)(5x+y)-2y(x-y)
11
(a+—b)(a-—b)+(a-2b)(a+2b)107×93
44
(4x-y)(4x+y)-2y(x-y)a2(2a+7b)(2a-7b)-a2b2
(6x+4)(6x-4)+6x(6x+3)(8x+5y)(8x-5y)-(8x+1)(8x-1)
6x(x-1)-(x-2)(x+2)(4m+4)(4m-4)
x(x-8)+(8-x)(8+x)(7x-y)(7x+y)+2y(x-y)
11
(a+—b)(a-—b)-(2a-4b)(2a+4b)207×193
55
(6x-y)(6x+y)-4y(x+y)a2(5a+9b)(5a-9b)-a2b2
(3x+7)(3x-7)+3x(3x-6)(8x+y)(8x-y)-(8x+3)(8x-3)
5x(x-9)-(x-1)(x+1)(7m+1)(7m-1)
x(x+8)+(5-x)(5+x)(6x-y)(6x+y)-4y(x-y)
11
(a+—b)(a-—b)+(4a-4b)(4a+4b)505×495
55
(4x-y)(4x+y)-2y(x+y)a2(8a+9b)(8a-9b)+a2b2
(8x+3)(8x-3)+8x(8x+3)(2x+6y)(2x-6y)+(2x+9)(2x-9)
5x(x-8)+(x-4)(x+4)(3m+3)(3m-3)
x(x-7)-(1-x)(1+x)(4x-y)(4x+y)-2y(x-y)
11
(a+—b)(a-—b)+(5a-b)(5a+b)201×199
22
(8x-y)(8x+y)-5y(x+y)a2(2a+6b)(2a-6b)+a2b2
(7x+2)(7x-2)+7x(7x+8)(8x+5y)(8x-5y)+(8x+5)(8x-5)
5x(x-3)+(x-5)(x+5)(8m+3)(8m-3)
x(x-7)+(9-x)(9+x)(x-y)(x+y)+5y(x-y)
11
(a+—b)(a-—b)+(a-5b)(a+5b)403×397
44
(9x-y)(9x+y)+2y(x+y)a2(4a+7b)(4a-7b)-a2b2
(x+5)(x-5)+x(x+3)(x+8y)(x-8y)+(x+4)(x-4)
3x(x-3)-(x-4)(x+4)(6m+1)(6m-1)
x(x-2)-(8-x)(8+x)(2x-y)(2x+y)+5y(x+y)
11
(a+—b)(a-—b)-(3a-2b)(3a+2b)109×91
44
(5x-y)(5x+y)-3y(x-y)a2(3a+6b)(3a-6b)-a2b2
(7x+6)(7x-6)+7x(7x-6)(2x+6y)(2x-6y)-(2x+2)(2x-2)
3x(x-2)+(x-4)(x+4)(6m+7)(6m-7)
x(x+2)+(2-x)(2+x)(8x-y)(8x+y)-5y(x-y)
11
(a+—b)(a-—b)-(2a-3b)(2a+3b)603×597
44
(7x-y)(7x+y)+2y(x-y)a2(5a+b)(5a-b)+a2b2
(7x+2)(7x-2)-7x(7x+8)(9x+2y)(9x-2y)+(9x+4)(9x-4)
2x(x-3)+(x-1)(x+1)(5m+3)(5m-3)
x(x-3)+(1-x)(1+x)(3x-y)(3x+y)+2y(x+y)
11
(a+—b)(a-—b)-(2a-2b)(2a+2b)201×199
22
(2x-y)(2x+y)-5y(x+y)a2(9a+8b)(9a-8b)+a2b2
(x+9)(x-9)-x(x-3)(2x+8y)(2x-8y)-(2x+8)(2x-8)
6x(x+7)+(x-3)(x+3)(2m+5)(2m-5)
x(x-8)-(5-x)(5+x)(7x-y)(7x+y)-3y(x-y)
11
(a+—b)(a-—b)-(3a-3b)(3a+3b)404×396
44
(8x-y)(8x+y)+3y(x+y)a2(7a+7b)(7a-7b)-a2b2
(4x+4)(4x-4)-4x(4x-8)(4x+6y)(4x-6y)-(4x+2)(4x-2)
2x(x-2)+(x-5)(x+5)(6m+4)(6m-4)
x(x-3)+(4-x)(4+x)(8x-y)(8x+y)+3y(x-y)
11
(a+—b)(a-—b)+(5a-4b)(5a+4b)103×97
55
(3x-y)(3x+y)-4y(x+y)a2(6a+2b)(6a-2b)+a2b2
(8x+9)(8x-9)+8x(8x-1)(4x+8y)(4x-8y)-(4x+9)(4x-9)
2x(x+8)+(x-2)(x+2)(8m+5)(8m-5)
x(x-7)-(9-x)(9+x)(7x-y)(7x+y)+3y(x-y)
11
(a+—b)(a-—b)+(5a-4b)(5a+4b)601×599
44
(5x-y)(5x+y)+3y(x+y)a2(8a+3b)(8a-3b)+a2b2
(x+5)(x-5)+x(x-1)(6x+5y)(6x-5y)-(6x+9)(6x-9)
4x(x+7)+(x-5)(x+5)(3m+7)(3m-7)
x(x-1)+(1-x)(1+x)(7x-y)(7x+y)-2y(x-y)
11
(a+—b)(a-—b)-(2a-3b)(2a+3b)701×699
33
(8x-y)(8x+y)+2y(x-y)a2(a+5b)(a-5b)-a2b2
(6x+4)(6x-4)+6x(6x-5)(7x+9y)(7x-9y)-(7x+7)(7x-7)
3x(x+8)-(x-3)(x+3)(9m+7)(9m-7)
x(x+3)+(8-x)(8+x)(5x-y)(5x+y)+4y(x+y)
11
(a+—b)(a-—b)+(2a-4b)(2a+4b)108×92
33
(2x-y)(2x+y)+5y(x+y)a2(8a+2b)(8a-2b)-a2b2
(8x+3)(8x-3)-8x(8x+6)(6x+6y)(6x-6y)+(6x+8)(6x-8)
4x(x+7)+(x-5)(x+5)(9m+2)(9m-2)
x(x-3)-(3-x)(3+x)(4x-y)(4x+y)+2y(x+y)
11
(a+—b)(a-—b)-(4a-3b)(4a+3b)903×897
22
(7x-y)(7x+y)+5y(x-y)a2(3a+4b)(3a-4b)+a2b2
(2x+4)(2x-4)+2x(2x-2)(5x+2y)(5x-2y)-(5x+9)(5x-9)
5x(x-5)-(x-5)(x+5)(2m+4)(2m-4)
x(x+9)-(2-x)(2+x)(5x-y)(5x+y)-2y(x-y)
11
(a+—b)(a-—b)-(3a-4b)(3a+4b)107×93
44
(7x-y)(7x+y)-4y(x-y)a2(a+7b)(a-7b)-a2b2
(7x+6)(7x-6)+7x(7x-9)(6x+y)(6x-y)-(6x+9)(6x-9)
2x(x+5)+(x-1)(x+1)(m+7)(m-7)
x(x-1)+(1-x)(1+x)(4x-y)(4x+y)-5y(x+y)
11
(a+—b)(a-—b)+(3a-2b)(3a+2b)905×895
22
(2x-y)(2x+y)-4y(x+y)a2(4a+b)(4a-b)-a2b2
(5x+1)(5x-1)-5x(5x+4)(8x+3y)(8x-3y)+(8x+7)(8x-7)
2x(x-3)+(x-5)(x+5)(5m+8)(5m-8)
x(x-8)+(6-x)(6+x)(6x-y)(6x+y)+2y(x+y)
11
(a+—b)(a-—b)+(a-4b)(a+4b)804×796
44
(3x-y)(3x+y)-5y(x-y)a2(7a+9b)(7a-9b)-a2b2
(6x+4)(6x-4)-6x(6x+9)(3x+8y)(3x-8y)+(3x+7)(3x-7)
5x(x+5)-(x-3)(x+3)(3m+7)(3m-7)
x(x+7)-(4-x)(4+x)(7x-y)(7x+y)-4y(x-y)
11
(a+—b)(a-—b)-(3a-4b)(3a+4b)603×597
44
(8x-y)(8x+y)-3y(x-y)a2(a+9b)(a-9b)-a2b2
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