七年级数学下册平方差公式专项训练 14.docx
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七年级数学下册平方差公式专项训练14
(7x+6)(7x-6)+7x(7x-2)(7x+4y)(7x-4y)+(7x+8)(7x-8)
5x(x-5)-(x-1)(x+1)(5m+8)(5m-8)
x(x+7)+(5-x)(5+x)(6x-y)(6x+y)-3y(x-y)
11
(a+—b)(a-—b)+(2a-b)(2a+b)1001×999
33
(x-y)(x+y)+5y(x-y)a2(5a+7b)(5a-7b)-a2b2
(6x+9)(6x-9)-6x(6x-9)(3x+9y)(3x-9y)-(3x+6)(3x-6)
2x(x-2)-(x-1)(x+1)(8m+2)(8m-2)
x(x+6)+(6-x)(6+x)(x-y)(x+y)-3y(x-y)
11
(a+—b)(a-—b)+(3a-b)(3a+b)603×597
44
(7x-y)(7x+y)+4y(x-y)a2(a+2b)(a-2b)-a2b2
(5x+8)(5x-8)-5x(5x-1)(4x+3y)(4x-3y)+(4x+9)(4x-9)
6x(x-3)-(x-4)(x+4)(9m+7)(9m-7)
x(x-1)+(2-x)(2+x)(9x-y)(9x+y)-3y(x-y)
11
(a+—b)(a-—b)-(5a-4b)(5a+4b)605×595
33
(2x-y)(2x+y)-2y(x-y)a2(6a+6b)(6a-6b)-a2b2
(7x+5)(7x-5)+7x(7x-4)(4x+5y)(4x-5y)-(4x+5)(4x-5)
5x(x+1)-(x-3)(x+3)(4m+5)(4m-5)
x(x+9)-(5-x)(5+x)(2x-y)(2x+y)+5y(x+y)
11
(a+—b)(a-—b)+(4a-3b)(4a+3b)703×697
33
(5x-y)(5x+y)-3y(x-y)a2(4a+3b)(4a-3b)-a2b2
(2x+5)(2x-5)-2x(2x+3)(9x+y)(9x-y)+(9x+7)(9x-7)
2x(x-1)-(x-4)(x+4)(7m+4)(7m-4)
x(x+4)-(8-x)(8+x)(x-y)(x+y)-4y(x+y)
11
(a+—b)(a-—b)+(2a-3b)(2a+3b)104×96
55
(4x-y)(4x+y)+4y(x+y)a2(3a+4b)(3a-4b)-a2b2
(6x+6)(6x-6)+6x(6x-7)(5x+7y)(5x-7y)-(5x+9)(5x-9)
4x(x+3)+(x-1)(x+1)(2m+5)(2m-5)
x(x+9)+(5-x)(5+x)(8x-y)(8x+y)+5y(x+y)
11
(a+—b)(a-—b)+(a-2b)(a+2b)906×894
33
(2x-y)(2x+y)-4y(x+y)a2(8a+7b)(8a-7b)-a2b2
(8x+5)(8x-5)+8x(8x+9)(2x+5y)(2x-5y)+(2x+5)(2x-5)
2x(x-3)-(x-4)(x+4)(7m+5)(7m-5)
x(x-9)+(6-x)(6+x)(9x-y)(9x+y)+2y(x-y)
11
(a+—b)(a-—b)-(4a-b)(4a+b)1008×992
22
(7x-y)(7x+y)+4y(x-y)a2(9a+5b)(9a-5b)-a2b2
(5x+3)(5x-3)-5x(5x-2)(7x+8y)(7x-8y)+(7x+5)(7x-5)
5x(x+3)-(x-1)(x+1)(8m+6)(8m-6)
x(x-1)+(9-x)(9+x)(7x-y)(7x+y)-5y(x+y)
11
(a+—b)(a-—b)+(a-b)(a+b)703×697
44
(2x-y)(2x+y)-4y(x-y)a2(3a+b)(3a-b)+a2b2
(3x+7)(3x-7)+3x(3x+8)(4x+5y)(4x-5y)+(4x+7)(4x-7)
3x(x+7)-(x-4)(x+4)(2m+6)(2m-6)
x(x+3)-(4-x)(4+x)(8x-y)(8x+y)-5y(x-y)
11
(a+—b)(a-—b)+(a-b)(a+b)504×496
22
(5x-y)(5x+y)+5y(x+y)a2(7a+8b)(7a-8b)+a2b2
(8x+6)(8x-6)-8x(8x-3)(x+y)(x-y)-(x+9)(x-9)
6x(x+4)+(x-2)(x+2)(9m+5)(9m-5)
x(x+5)+(6-x)(6+x)(7x-y)(7x+y)+2y(x-y)
11
(a+—b)(a-—b)-(3a-4b)(3a+4b)406×394
22
(4x-y)(4x+y)-3y(x-y)a2(5a+7b)(5a-7b)-a2b2
(8x+5)(8x-5)+8x(8x+6)(3x+6y)(3x-6y)+(3x+8)(3x-8)
5x(x-8)+(x-2)(x+2)(5m+4)(5m-4)
x(x+3)-(3-x)(3+x)(3x-y)(3x+y)+4y(x+y)
11
(a+—b)(a-—b)-(5a-5b)(5a+5b)105×95
22
(7x-y)(7x+y)+3y(x+y)a2(4a+5b)(4a-5b)+a2b2
(3x+6)(3x-6)-3x(3x+3)(6x+y)(6x-y)+(6x+1)(6x-1)
3x(x+5)-(x-3)(x+3)(5m+2)(5m-2)
x(x+9)+(7-x)(7+x)(4x-y)(4x+y)+2y(x-y)
11
(a+—b)(a-—b)-(3a-4b)(3a+4b)606×594
33
(x-y)(x+y)-2y(x+y)a2(a+5b)(a-5b)+a2b2
(9x+4)(9x-4)+9x(9x+9)(6x+6y)(6x-6y)+(6x+2)(6x-2)
6x(x-3)+(x-4)(x+4)(7m+7)(7m-7)
x(x+4)+(1-x)(1+x)(7x-y)(7x+y)-5y(x+y)
11
(a+—b)(a-—b)+(3a-4b)(3a+4b)1004×996
22
(x-y)(x+y)-3y(x-y)a2(2a+6b)(2a-6b)+a2b2
(6x+8)(6x-8)-6x(6x+9)(x+6y)(x-6y)+(x+8)(x-8)
4x(x+1)-(x-1)(x+1)(3m+7)(3m-7)
x(x-3)+(3-x)(3+x)(8x-y)(8x+y)+5y(x+y)
11
(a+—b)(a-—b)+(3a-4b)(3a+4b)102×98
55
(5x-y)(5x+y)+2y(x-y)a2(8a+9b)(8a-9b)-a2b2
(7x+6)(7x-6)-7x(7x-3)(7x+5y)(7x-5y)+(7x+1)(7x-1)
3x(x-2)+(x-4)(x+4)(8m+9)(8m-9)
x(x-8)+(5-x)(5+x)(x-y)(x+y)-4y(x-y)
11
(a+—b)(a-—b)-(5a-2b)(5a+2b)503×497
44
(3x-y)(3x+y)+4y(x-y)a2(8a+4b)(8a-4b)-a2b2
(3x+2)(3x-2)+3x(3x+6)(6x+8y)(6x-8y)+(6x+6)(6x-6)
5x(x+6)-(x-3)(x+3)(9m+3)(9m-3)
x(x-10)+(1-x)(1+x)(7x-y)(7x+y)+4y(x-y)
11
(a+—b)(a-—b)+(2a-4b)(2a+4b)1004×996
44
(8x-y)(8x+y)+5y(x-y)a2(3a+8b)(3a-8b)+a2b2
(7x+7)(7x-7)+7x(7x-7)(2x+y)(2x-y)-(2x+1)(2x-1)
4x(x-6)+(x-2)(x+2)(7m+7)(7m-7)
x(x-3)+(8-x)(8+x)(5x-y)(5x+y)-4y(x+y)
11
(a+—b)(a-—b)-(3a-2b)(3a+2b)604×596
44
(2x-y)(2x+y)+5y(x-y)a2(2a+b)(2a-b)-a2b2
(4x+8)(4x-8)+4x(4x+6)(9x+6y)(9x-6y)-(9x+6)(9x-6)
2x(x-4)-(x-2)(x+2)(8m+9)(8m-9)
x(x+10)+(4-x)(4+x)(8x-y)(8x+y)-2y(x+y)
11
(a+—b)(a-—b)+(4a-b)(4a+b)109×91
44
(7x-y)(7x+y)+2y(x+y)a2(4a+2b)(4a-2b)-a2b2
(3x+2)(3x-2)+3x(3x+8)(6x+2y)(6x-2y)+(6x+3)(6x-3)
3x(x+1)-(x-2)(x+2)(7m+9)(7m-9)
x(x-4)+(9-x)(9+x)(x-y)(x+y)+2y(x+y)
11
(a+—b)(a-—b)-(2a-3b)(2a+3b)907×893
22
(7x-y)(7x+y)-4y(x-y)a2(9a+4b)(9a-4b)-a2b2