七年级数学下册平方差公式专项训练 23.docx
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七年级数学下册平方差公式专项训练23
(4x+3)(4x-3)-4x(4x+1)(3x+8y)(3x-8y)-(3x+9)(3x-9)
6x(x+1)+(x-4)(x+4)(6m+6)(6m-6)
x(x+8)+(4-x)(4+x)(5x-y)(5x+y)-2y(x+y)
11
(a+—b)(a-—b)-(4a-3b)(4a+3b)208×192
44
(7x-y)(7x+y)-4y(x-y)a2(4a+9b)(4a-9b)-a2b2
(2x+8)(2x-8)-2x(2x-9)(3x+4y)(3x-4y)+(3x+6)(3x-6)
4x(x+9)-(x-5)(x+5)(7m+5)(7m-5)
x(x+3)+(9-x)(9+x)(2x-y)(2x+y)-4y(x+y)
11
(a+—b)(a-—b)+(2a-2b)(2a+2b)502×498
55
(2x-y)(2x+y)-5y(x+y)a2(7a+7b)(7a-7b)+a2b2
(9x+5)(9x-5)+9x(9x-1)(5x+y)(5x-y)+(5x+8)(5x-8)
5x(x+1)+(x-4)(x+4)(5m+1)(5m-1)
x(x-4)-(6-x)(6+x)(9x-y)(9x+y)+2y(x-y)
11
(a+—b)(a-—b)-(5a-2b)(5a+2b)904×896
33
(9x-y)(9x+y)-2y(x-y)a2(3a+2b)(3a-2b)-a2b2
(4x+3)(4x-3)-4x(4x+9)(x+4y)(x-4y)-(x+3)(x-3)
3x(x-6)+(x-4)(x+4)(8m+6)(8m-6)
x(x-7)+(3-x)(3+x)(3x-y)(3x+y)-2y(x+y)
11
(a+—b)(a-—b)-(5a-3b)(5a+3b)601×599
44
(3x-y)(3x+y)+2y(x+y)a2(8a+2b)(8a-2b)-a2b2
(4x+1)(4x-1)-4x(4x+5)(8x+8y)(8x-8y)+(8x+4)(8x-4)
4x(x-2)-(x-1)(x+1)(7m+5)(7m-5)
x(x-4)+(2-x)(2+x)(5x-y)(5x+y)+2y(x-y)
11
(a+—b)(a-—b)-(3a-3b)(3a+3b)306×294
33
(8x-y)(8x+y)-3y(x-y)a2(8a+8b)(8a-8b)-a2b2
(9x+1)(9x-1)-9x(9x-7)(6x+8y)(6x-8y)+(6x+5)(6x-5)
6x(x-5)-(x-5)(x+5)(7m+1)(7m-1)
x(x-8)-(8-x)(8+x)(7x-y)(7x+y)+5y(x+y)
11
(a+—b)(a-—b)+(a-2b)(a+2b)106×94
44
(2x-y)(2x+y)-2y(x+y)a2(8a+b)(8a-b)-a2b2
(5x+5)(5x-5)+5x(5x+5)(5x+3y)(5x-3y)-(5x+4)(5x-4)
4x(x-8)-(x-1)(x+1)(9m+2)(9m-2)
x(x-1)-(3-x)(3+x)(2x-y)(2x+y)+2y(x+y)
11
(a+—b)(a-—b)+(a-5b)(a+5b)703×697
22
(6x-y)(6x+y)+5y(x+y)a2(3a+3b)(3a-3b)-a2b2
(5x+3)(5x-3)+5x(5x-8)(x+8y)(x-8y)+(x+8)(x-8)
5x(x-9)-(x-5)(x+5)(3m+9)(3m-9)
x(x+6)+(6-x)(6+x)(4x-y)(4x+y)-4y(x+y)
11
(a+—b)(a-—b)+(4a-3b)(4a+3b)1002×998
33
(4x-y)(4x+y)+5y(x+y)a2(2a+b)(2a-b)+a2b2
(7x+5)(7x-5)+7x(7x-3)(5x+7y)(5x-7y)-(5x+9)(5x-9)
3x(x+1)-(x-1)(x+1)(8m+3)(8m-3)
x(x-3)+(6-x)(6+x)(x-y)(x+y)-3y(x+y)
11
(a+—b)(a-—b)-(a-2b)(a+2b)309×291
55
(x-y)(x+y)-4y(x-y)a2(3a+5b)(3a-5b)+a2b2
(7x+2)(7x-2)-7x(7x+6)(5x+6y)(5x-6y)-(5x+2)(5x-2)
2x(x-6)+(x-1)(x+1)(7m+7)(7m-7)
x(x+9)-(8-x)(8+x)(8x-y)(8x+y)-5y(x+y)
11
(a+—b)(a-—b)-(4a-b)(4a+b)204×196
55
(6x-y)(6x+y)+2y(x-y)a2(7a+3b)(7a-3b)+a2b2
(x+5)(x-5)+x(x+1)(6x+5y)(6x-5y)-(6x+3)(6x-3)
3x(x-7)-(x-4)(x+4)(7m+8)(7m-8)
x(x-10)+(5-x)(5+x)(8x-y)(8x+y)+5y(x-y)
11
(a+—b)(a-—b)-(2a-4b)(2a+4b)902×898
22
(2x-y)(2x+y)-5y(x-y)a2(9a+b)(9a-b)-a2b2
(6x+7)(6x-7)-6x(6x+9)(2x+9y)(2x-9y)+(2x+6)(2x-6)
5x(x-4)-(x-4)(x+4)(8m+7)(8m-7)
x(x+10)-(5-x)(5+x)(2x-y)(2x+y)+3y(x-y)
11
(a+—b)(a-—b)+(4a-2b)(4a+2b)208×192
55
(9x-y)(9x+y)-4y(x+y)a2(7a+9b)(7a-9b)+a2b2
(3x+3)(3x-3)+3x(3x+1)(7x+4y)(7x-4y)-(7x+1)(7x-1)
3x(x+7)+(x-5)(x+5)(7m+5)(7m-5)
x(x-9)+(2-x)(2+x)(7x-y)(7x+y)-3y(x-y)
11
(a+—b)(a-—b)-(5a-2b)(5a+2b)1005×995
44
(4x-y)(4x+y)-2y(x+y)a2(a+5b)(a-5b)-a2b2
(9x+8)(9x-8)+9x(9x-3)(3x+y)(3x-y)+(3x+1)(3x-1)
3x(x-1)+(x-1)(x+1)(4m+5)(4m-5)
x(x-8)-(9-x)(9+x)(7x-y)(7x+y)-3y(x+y)
11
(a+—b)(a-—b)-(2a-4b)(2a+4b)607×593
33
(5x-y)(5x+y)-2y(x+y)a2(3a+9b)(3a-9b)-a2b2
(3x+8)(3x-8)-3x(3x-4)(x+3y)(x-3y)+(x+2)(x-2)
2x(x+7)+(x-3)(x+3)(9m+5)(9m-5)
x(x-9)-(1-x)(1+x)(5x-y)(5x+y)+4y(x-y)
11
(a+—b)(a-—b)-(2a-4b)(2a+4b)707×693
33
(2x-y)(2x+y)-4y(x+y)a2(a+4b)(a-4b)-a2b2
(6x+8)(6x-8)+6x(6x-6)(4x+3y)(4x-3y)+(4x+1)(4x-1)
5x(x+7)+(x-2)(x+2)(4m+9)(4m-9)
x(x+5)+(1-x)(1+x)(5x-y)(5x+y)-4y(x+y)
11
(a+—b)(a-—b)-(3a-b)(3a+b)903×897
33
(9x-y)(9x+y)+2y(x+y)a2(6a+4b)(6a-4b)-a2b2
(x+1)(x-1)-x(x-3)(2x+4y)(2x-4y)+(2x+8)(2x-8)
3x(x-5)-(x-4)(x+4)(m+3)(m-3)
x(x+5)+(9-x)(9+x)(4x-y)(4x+y)+4y(x+y)
11
(a+—b)(a-—b)+(2a-3b)(2a+3b)106×94
33
(3x-y)(3x+y)-4y(x-y)a2(4a+6b)(4a-6b)-a2b2
(8x+9)(8x-9)+8x(8x+2)(5x+2y)(5x-2y)+(5x+4)(5x-4)
4x(x+4)-(x-4)(x+4)(4m+2)(4m-2)
x(x+10)+(5-x)(5+x)(8x-y)(8x+y)+3y(x-y)
11
(a+—b)(a-—b)+(3a-5b)(3a+5b)105×95
55
(2x-y)(2x+y)+4y(x+y)a2(9a+5b)(9a-5b)+a2b2
(x+1)(x-1)-x(x-8)(x+4y)(x-4y)+(x+7)(x-7)
2x(x-7)+(x-1)(x+1)(6m+9)(6m-9)
x(x-9)-(9-x)(9+x)(9x-y)(9x+y)-2y(x-y)
11
(a+—b)(a-—b)-(5a-3b)(5a+3b)507×493
55
(5x-y)(5x+y)+3y(x+y)a2(2a+5b)(2a-5b)+a2b2