七年级数学下册平方差公式专项训练 9.docx
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七年级数学下册平方差公式专项训练9
(4x+6)(4x-6)+4x(4x-6)(3x+5y)(3x-5y)+(3x+7)(3x-7)
4x(x+6)+(x-3)(x+3)(9m+1)(9m-1)
x(x+7)-(4-x)(4+x)(6x-y)(6x+y)-4y(x-y)
11
(a+—b)(a-—b)+(3a-2b)(3a+2b)707×693
22
(3x-y)(3x+y)+5y(x+y)a2(a+6b)(a-6b)+a2b2
(5x+3)(5x-3)-5x(5x-5)(3x+y)(3x-y)+(3x+3)(3x-3)
5x(x-2)+(x-3)(x+3)(7m+5)(7m-5)
x(x-7)+(9-x)(9+x)(x-y)(x+y)-3y(x+y)
11
(a+—b)(a-—b)+(a-2b)(a+2b)805×795
55
(5x-y)(5x+y)-2y(x-y)a2(a+8b)(a-8b)+a2b2
(4x+6)(4x-6)+4x(4x+5)(x+2y)(x-2y)-(x+8)(x-8)
4x(x+8)+(x-3)(x+3)(5m+1)(5m-1)
x(x+9)-(7-x)(7+x)(7x-y)(7x+y)+4y(x-y)
11
(a+—b)(a-—b)+(2a-2b)(2a+2b)607×593
55
(3x-y)(3x+y)-2y(x-y)a2(6a+2b)(6a-2b)+a2b2
(5x+9)(5x-9)-5x(5x-8)(x+2y)(x-2y)+(x+7)(x-7)
4x(x+9)-(x-1)(x+1)(4m+6)(4m-6)
x(x+2)+(7-x)(7+x)(4x-y)(4x+y)+3y(x+y)
11
(a+—b)(a-—b)+(5a-4b)(5a+4b)301×299
33
(2x-y)(2x+y)+3y(x-y)a2(2a+6b)(2a-6b)-a2b2
(9x+3)(9x-3)+9x(9x-7)(3x+6y)(3x-6y)-(3x+9)(3x-9)
6x(x+7)-(x-3)(x+3)(m+1)(m-1)
x(x-9)-(6-x)(6+x)(7x-y)(7x+y)-4y(x+y)
11
(a+—b)(a-—b)+(3a-5b)(3a+5b)102×98
55
(2x-y)(2x+y)-5y(x+y)a2(8a+6b)(8a-6b)-a2b2
(x+9)(x-9)-x(x-6)(2x+3y)(2x-3y)+(2x+5)(2x-5)
4x(x+8)-(x-5)(x+5)(5m+5)(5m-5)
x(x+10)-(1-x)(1+x)(5x-y)(5x+y)+2y(x-y)
11
(a+—b)(a-—b)+(4a-2b)(4a+2b)103×97
33
(8x-y)(8x+y)-4y(x+y)a2(6a+b)(6a-b)+a2b2
(7x+3)(7x-3)+7x(7x+4)(9x+6y)(9x-6y)+(9x+6)(9x-6)
5x(x+2)+(x-3)(x+3)(8m+6)(8m-6)
x(x-2)+(5-x)(5+x)(2x-y)(2x+y)+2y(x-y)
11
(a+—b)(a-—b)-(3a-2b)(3a+2b)409×391
44
(6x-y)(6x+y)+2y(x-y)a2(3a+3b)(3a-3b)+a2b2
(4x+5)(4x-5)+4x(4x-6)(4x+3y)(4x-3y)+(4x+6)(4x-6)
2x(x-5)-(x-4)(x+4)(6m+6)(6m-6)
x(x-1)+(9-x)(9+x)(6x-y)(6x+y)-2y(x+y)
11
(a+—b)(a-—b)+(3a-3b)(3a+3b)401×399
55
(8x-y)(8x+y)+4y(x+y)a2(9a+8b)(9a-8b)+a2b2
(3x+7)(3x-7)+3x(3x-9)(8x+3y)(8x-3y)-(8x+4)(8x-4)
5x(x-8)-(x-1)(x+1)(2m+7)(2m-7)
x(x+7)+(5-x)(5+x)(9x-y)(9x+y)-2y(x-y)
11
(a+—b)(a-—b)+(4a-2b)(4a+2b)303×297
44
(9x-y)(9x+y)-5y(x-y)a2(9a+7b)(9a-7b)-a2b2
(x+8)(x-8)-x(x+2)(2x+2y)(2x-2y)+(2x+3)(2x-3)
2x(x-7)+(x-5)(x+5)(5m+7)(5m-7)
x(x+10)+(9-x)(9+x)(5x-y)(5x+y)+3y(x-y)
11
(a+—b)(a-—b)-(5a-3b)(5a+3b)1003×997
22
(9x-y)(9x+y)-4y(x+y)a2(3a+3b)(3a-3b)-a2b2
(7x+3)(7x-3)-7x(7x+4)(7x+3y)(7x-3y)+(7x+8)(7x-8)
6x(x-3)+(x-1)(x+1)(6m+6)(6m-6)
x(x+1)-(8-x)(8+x)(9x-y)(9x+y)-5y(x+y)
11
(a+—b)(a-—b)+(5a-2b)(5a+2b)805×795
44
(5x-y)(5x+y)-5y(x+y)a2(3a+9b)(3a-9b)+a2b2
(7x+3)(7x-3)+7x(7x+8)(8x+8y)(8x-8y)+(8x+7)(8x-7)
2x(x-5)-(x-5)(x+5)(4m+8)(4m-8)
x(x-6)+(8-x)(8+x)(5x-y)(5x+y)+5y(x+y)
11
(a+—b)(a-—b)+(a-b)(a+b)801×799
33
(5x-y)(5x+y)-5y(x+y)a2(8a+4b)(8a-4b)+a2b2
(7x+1)(7x-1)-7x(7x-9)(8x+2y)(8x-2y)+(8x+3)(8x-3)
5x(x-2)+(x-1)(x+1)(2m+8)(2m-8)
x(x-2)+(4-x)(4+x)(x-y)(x+y)+5y(x-y)
11
(a+—b)(a-—b)-(2a-5b)(2a+5b)904×896
55
(6x-y)(6x+y)-2y(x-y)a2(3a+5b)(3a-5b)-a2b2
(3x+3)(3x-3)-3x(3x-3)(6x+5y)(6x-5y)-(6x+6)(6x-6)
4x(x+7)-(x-5)(x+5)(m+8)(m-8)
x(x-4)-(7-x)(7+x)(9x-y)(9x+y)+3y(x+y)
11
(a+—b)(a-—b)+(5a-2b)(5a+2b)106×94
55
(x-y)(x+y)-4y(x+y)a2(9a+3b)(9a-3b)+a2b2
(2x+6)(2x-6)-2x(2x-8)(9x+4y)(9x-4y)-(9x+9)(9x-9)
2x(x-5)-(x-2)(x+2)(3m+8)(3m-8)
x(x+4)-(4-x)(4+x)(3x-y)(3x+y)-3y(x-y)
11
(a+—b)(a-—b)+(4a-b)(4a+b)803×797
22
(x-y)(x+y)+3y(x-y)a2(7a+2b)(7a-2b)-a2b2
(9x+9)(9x-9)+9x(9x+2)(4x+2y)(4x-2y)+(4x+6)(4x-6)
2x(x-8)-(x-1)(x+1)(9m+7)(9m-7)
x(x-9)-(5-x)(5+x)(7x-y)(7x+y)+5y(x-y)
11
(a+—b)(a-—b)-(3a-4b)(3a+4b)702×698
55
(6x-y)(6x+y)+4y(x-y)a2(8a+8b)(8a-8b)-a2b2
(8x+2)(8x-2)+8x(8x-6)(x+4y)(x-4y)+(x+4)(x-4)
2x(x+2)-(x-1)(x+1)(m+1)(m-1)
x(x+1)-(8-x)(8+x)(2x-y)(2x+y)-3y(x+y)
11
(a+—b)(a-—b)+(a-4b)(a+4b)405×395
33
(3x-y)(3x+y)-5y(x+y)a2(8a+5b)(8a-5b)+a2b2
(7x+3)(7x-3)+7x(7x+4)(8x+5y)(8x-5y)-(8x+2)(8x-2)
2x(x+1)+(x-4)(x+4)(m+4)(m-4)
x(x+7)-(6-x)(6+x)(3x-y)(3x+y)-4y(x+y)
11
(a+—b)(a-—b)+(3a-2b)(3a+2b)709×691
22
(7x-y)(7x+y)-2y(x-y)a2(8a+9b)(8a-9b)+a2b2
(7x+6)(7x-6)-7x(7x+2)(9x+6y)(9x-6y)+(9x+9)(9x-9)
4x(x+3)-(x-2)(x+2)(2m+9)(2m-9)
x(x+4)-(1-x)(1+x)(5x-y)(5x+y)+3y(x+y)
11
(a+—b)(a-—b)-(a-b)(a+b)402×398
33
(3x-y)(3x+y)-4y(x-y)a2(6a+3b)(6a-3b)+a2b2