北师大版七年级数学下册整式的乘法练习题 139文档格式.docx
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(x+2y)2-(x-2y)2
(-m+1)(-m-1)
(-x+4y)2
-8(x-y)2
2(mn+4)(mn-4)
[(m+2n)-1][(m+2n)+1]-m2
2x2-(-2-2x)(-2+2x)
(-2a-b+c)(-2a-b-c)
(2n+3m)(2n-3m)
(-x+5y)2
-4(x-y)2
4(x+2y)(x-2y)
(m+2n)(m-2n)-m2
(4-y+x)(4-y-x)
(-2x+3)2-(-2x-3)2
(x+2y)(x-2y)
3[(x+2y)-1][(x+2y)+1]
2x2-(x+2y)(x-2y)
(2n+3m-4)(2n+3m+4)
(5-3t)2-(5+3t)2
(-x+3y)2
(5-3n)(5+3n)-m2
3x2-(-x+1)(-x-1)
(x+2y+z)(x+2y-z)
(4-y)(4+y)
(-x+6y)2
-6(x-y)2
4x2-(x+4)(x-4)
(-2a-2b)(-2a+2b)
2(-2x+3)(-2x-3)
2x2-(2y+3x)(2y-3x)
(-m+1+n)(-m+1-n)
(-2a-2b)2-(-2a+2b)2
(-2-2a)(-2+2a)
2(2n+3m)(2n-3m)
3x2-(-2-2x)(-2+2x)
(mn+4)2-(mn-4)2
3(4-y)(4+y)
(2n+3m)2-(2n-3m)2
(-2x+3)(-2x-3)
(-x+2y)2
4(-2x+3)(-2x-3)
4x2-(5-3x)(5+3x)
2x2-(-x+1)(-x-1)
(4-y)2-(4+y)2
3(-2a-2b)(-2a+2b)
(2n+3m)(2n-3m)-m2
5x2-(x+2y)(x-2y)
[(x+2y)-1][(x+2y)+1]
(mn+4)(mn-4)
4(4-y)(4+y)
2x2-(5-3x)(5+3x)