七年级数学下册平方差公式专项训练 1.docx
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七年级数学下册平方差公式专项训练 1.docx
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七年级数学下册平方差公式专项训练1
(6x+9)(6x-9)+6x(6x-8)(4x+7y)(4x-7y)-(4x+4)(4x-4)
3x(x+3)-(x-3)(x+3)(5m+7)(5m-7)
x(x+2)-(8-x)(8+x)(9x-y)(9x+y)+2y(x+y)
11
(a+—b)(a-—b)+(2a-b)(2a+b)207×193
44
(7x-y)(7x+y)+5y(x-y)a2(a+9b)(a-9b)-a2b2
(7x+7)(7x-7)+7x(7x-9)(7x+6y)(7x-6y)+(7x+9)(7x-9)
5x(x+1)+(x-2)(x+2)(4m+7)(4m-7)
x(x-10)+(3-x)(3+x)(x-y)(x+y)-5y(x+y)
11
(a+—b)(a-—b)-(a-2b)(a+2b)707×693
22
(7x-y)(7x+y)+2y(x-y)a2(5a+b)(5a-b)+a2b2
(4x+7)(4x-7)+4x(4x+4)(5x+y)(5x-y)+(5x+7)(5x-7)
4x(x+6)+(x-2)(x+2)(4m+2)(4m-2)
x(x-8)+(9-x)(9+x)(7x-y)(7x+y)+2y(x-y)
11
(a+—b)(a-—b)-(2a-4b)(2a+4b)302×298
22
(x-y)(x+y)-3y(x+y)a2(7a+6b)(7a-6b)+a2b2
(3x+2)(3x-2)-3x(3x+9)(x+3y)(x-3y)+(x+6)(x-6)
6x(x+9)+(x-3)(x+3)(8m+4)(8m-4)
x(x-9)-(7-x)(7+x)(3x-y)(3x+y)-2y(x-y)
11
(a+—b)(a-—b)+(2a-b)(2a+b)301×299
22
(6x-y)(6x+y)+2y(x-y)a2(9a+9b)(9a-9b)-a2b2
(7x+4)(7x-4)-7x(7x+4)(6x+7y)(6x-7y)+(6x+3)(6x-3)
2x(x+9)-(x-3)(x+3)(2m+6)(2m-6)
x(x+6)+(5-x)(5+x)(x-y)(x+y)-3y(x-y)
11
(a+—b)(a-—b)-(5a-2b)(5a+2b)608×592
33
(6x-y)(6x+y)+5y(x-y)a2(9a+8b)(9a-8b)-a2b2
(4x+6)(4x-6)+4x(4x+6)(2x+y)(2x-y)+(2x+9)(2x-9)
6x(x+1)-(x-5)(x+5)(7m+5)(7m-5)
x(x-7)+(3-x)(3+x)(4x-y)(4x+y)-5y(x+y)
11
(a+—b)(a-—b)-(4a-4b)(4a+4b)504×496
33
(8x-y)(8x+y)-5y(x-y)a2(a+6b)(a-6b)-a2b2
(x+9)(x-9)+x(x-6)(9x+y)(9x-y)-(9x+7)(9x-7)
4x(x-8)+(x-2)(x+2)(5m+1)(5m-1)
x(x-10)+(1-x)(1+x)(4x-y)(4x+y)+3y(x-y)
11
(a+—b)(a-—b)-(3a-3b)(3a+3b)909×891
22
(3x-y)(3x+y)+4y(x+y)a2(8a+9b)(8a-9b)-a2b2
(3x+2)(3x-2)+3x(3x-8)(5x+7y)(5x-7y)+(5x+3)(5x-3)
3x(x-1)+(x-5)(x+5)(6m+3)(6m-3)
x(x-1)+(8-x)(8+x)(8x-y)(8x+y)-5y(x-y)
11
(a+—b)(a-—b)+(3a-5b)(3a+5b)901×899
55
(7x-y)(7x+y)+2y(x+y)a2(a+5b)(a-5b)-a2b2
(5x+7)(5x-7)+5x(5x-8)(3x+6y)(3x-6y)+(3x+4)(3x-4)
6x(x-5)+(x-3)(x+3)(3m+4)(3m-4)
x(x+6)+(7-x)(7+x)(7x-y)(7x+y)-3y(x-y)
11
(a+—b)(a-—b)-(5a-4b)(5a+4b)606×594
44
(2x-y)(2x+y)-3y(x-y)a2(9a+9b)(9a-9b)+a2b2
(4x+8)(4x-8)-4x(4x+2)(x+y)(x-y)-(x+2)(x-2)
5x(x+2)-(x-3)(x+3)(5m+5)(5m-5)
x(x+9)-(3-x)(3+x)(7x-y)(7x+y)+2y(x-y)
11
(a+—b)(a-—b)+(5a-2b)(5a+2b)604×596
33
(4x-y)(4x+y)+4y(x+y)a2(5a+7b)(5a-7b)+a2b2
(5x+4)(5x-4)+5x(5x-4)(8x+4y)(8x-4y)-(8x+2)(8x-2)
5x(x+6)+(x-2)(x+2)(8m+7)(8m-7)
x(x+4)-(4-x)(4+x)(4x-y)(4x+y)+3y(x-y)
11
(a+—b)(a-—b)-(5a-5b)(5a+5b)702×698
33
(7x-y)(7x+y)+5y(x+y)a2(3a+4b)(3a-4b)-a2b2
(7x+2)(7x-2)-7x(7x+7)(7x+7y)(7x-7y)-(7x+5)(7x-5)
5x(x+7)+(x-3)(x+3)(9m+7)(9m-7)
x(x-6)+(1-x)(1+x)(x-y)(x+y)+4y(x-y)
11
(a+—b)(a-—b)-(2a-3b)(2a+3b)309×291
33
(6x-y)(6x+y)-4y(x-y)a2(9a+9b)(9a-9b)+a2b2
(9x+1)(9x-1)+9x(9x+2)(7x+2y)(7x-2y)-(7x+7)(7x-7)
2x(x-1)+(x-1)(x+1)(5m+2)(5m-2)
x(x+2)+(3-x)(3+x)(8x-y)(8x+y)+4y(x+y)
11
(a+—b)(a-—b)+(3a-2b)(3a+2b)301×299
55
(2x-y)(2x+y)-3y(x+y)a2(7a+b)(7a-b)-a2b2
(9x+3)(9x-3)+9x(9x-8)(2x+2y)(2x-2y)-(2x+2)(2x-2)
6x(x-5)-(x-1)(x+1)(2m+6)(2m-6)
x(x-3)-(2-x)(2+x)(7x-y)(7x+y)-4y(x-y)
11
(a+—b)(a-—b)-(4a-3b)(4a+3b)507×493
33
(4x-y)(4x+y)+4y(x+y)a2(7a+8b)(7a-8b)+a2b2
(x+7)(x-7)+x(x+9)(2x+6y)(2x-6y)-(2x+7)(2x-7)
3x(x+4)+(x-5)(x+5)(5m+9)(5m-9)
x(x-9)-(4-x)(4+x)(6x-y)(6x+y)+2y(x-y)
11
(a+—b)(a-—b)+(5a-5b)(5a+5b)805×795
44
(8x-y)(8x+y)+3y(x+y)a2(6a+4b)(6a-4b)-a2b2
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