初一数学下册平方差公式专项练习 81.docx
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初一数学下册平方差公式专项练习 81.docx
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初一数学下册平方差公式专项练习81
(10-7a)(10+7a)(0.1x+0.3)(0.1x-0.3)
(a+2)(a-2)(x+9)(x-9)(x2+81)
(ab+9)(ab-9)(a+1)(a-1)(a2+1)
(-8m-n)(-8m+n)(an+2b)(an-2b)
(x+9y)(x-9y)(4mn-5n)(4mn+5n)
(y+4z)(y-4z)(-4x-5y)(-4x+5y)
(8x+5)(8x-5)(5x-8y)(5x+8y)
(-4x+8)(-4x-8)(3a-b)(3a+b)
(10-a)(10+a)(0.9x+0.1)(0.9x-0.1)
(m-2n)(m+2n)+2n2(-3k+3)(-3k-3)
(3x+3)(3x-3)(7x-2y)(7x+2y)
(1+3x)(1-3x)8x2-(y+4x)(y-4x)
(10-8a)(10+8a)(0.7x+0.5)(0.7x-0.5)
(a+9)(a-9)(x+8)(x-8)(x2+64)
(ab+4)(ab-4)(a+8)(a-8)(a2+64)
(-8m-5n)(-8m+5n)(an+4b)(an-4b)
(x+9y)(x-9y)(2mn-5n)(2mn+5n)
(y+2z)(y-2z)(-7x-y)(-7x+y)
(x+1)(x-1)(3x-4y)(3x+4y)
(-7x+8)(-7x-8)(3a-4b)(3a+4b)
(5-3a)(5+3a)(0.6x+0.4)(0.6x-0.4)
(4m-4n)(4m+4n)-7n2(-6k+1)(-6k-1)
(4x+1)(4x-1)(3x-5y)(3x+5y)
(9+4x)(9-4x)6x2-(y+3x)(y-3x)
(2-3a)(2+3a)(0.2x+0.6)(0.2x-0.6)
(a+1)(a-1)(x+6)(x-6)(x2+36)
(ab+2)(ab-2)(a+3)(a-3)(a2+9)
(-9m-5n)(-9m+5n)(an+7b)(an-7b)
(x+4y)(x-4y)(mn-5n)(mn+5n)
(y+3z)(y-3z)(-2x-5y)(-2x+5y)
(2x+1)(2x-1)(7x-y)(7x+y)
(-5x+2)(-5x-2)(6a-2b)(6a+2b)
(5-7a)(5+7a)(0.5x+0.7)(0.5x-0.7)
(9m-4n)(9m+4n)+8n2(-6k+6)(-6k-6)
(5x+1)(5x-1)(8x-5y)(8x+5y)
(6+x)(6-x)7x2-(y+3x)(y-3x)
(3-9a)(3+9a)(0.7x+0.2)(0.7x-0.2)
(a+2)(a-2)(x+6)(x-6)(x2+36)
(ab+1)(ab-1)(a+6)(a-6)(a2+36)
(-5m-3n)(-5m+3n)(an+b)(an-b)
(x+7y)(x-7y)(4mn-3n)(4mn+3n)
(y+8z)(y-8z)(-6x-3y)(-6x+3y)
(4x+4)(4x-4)(6x-6y)(6x+6y)
(-2x+7)(-2x-7)(7a-5b)(7a+5b)
(10-8a)(10+8a)(0.4x+0.1)(0.4x-0.1)
(m-n)(m+n)-3n2(-7k+10)(-7k-10)
(8x+2)(8x-2)(x-3y)(x+3y)
(2+3x)(2-3x)7x2+(y+6x)(y-6x)
(2-10a)(2+10a)(0.1x+0.7)(0.1x-0.7)
(a+7)(a-7)(x+3)(x-3)(x2+9)
(ab+3)(ab-3)(a+9)(a-9)(a2+81)
(-2m-2n)(-2m+2n)(an+9b)(an-9b)
(x+2y)(x-2y)(4mn-n)(4mn+n)
(y+2z)(y-2z)(-9x-4y)(-9x+4y)
(5x+2)(5x-2)(5x-6y)(5x+6y)
(-5x+4)(-5x-4)(4a-2b)(4a+2b)
(5-7a)(5+7a)(0.6x+0.3)(0.6x-0.3)
(6m-5n)(6m+5n)-7n2(-7k+3)(-7k-3)
(3x+8)(3x-8)(x-3y)(x+3y)
(3+3x)(3-3x)3x2+(y+2x)(y-2x)
(4-7a)(4+7a)(0.8x+0.2)(0.8x-0.2)
(a+9)(a-9)(x+8)(x-8)(x2+64)
(ab+9)(ab-9)(a+7)(a-7)(a2+49)
(-4m-2n)(-4m+2n)(an+9b)(an-9b)
(x+2y)(x-2y)(3mn-4n)(3mn+4n)
(y+3z)(y-3z)(-3x-2y)(-3x+2y)
(5x+5)(5x-5)(4x-9y)(4x+9y)
(-8x+10)(-8x-10)(4a-b)(4a+b)
(5-6a)(5+6a)(0.6x+0.6)(0.6x-0.6)
(9m-5n)(9m+5n)+6n2(-6k+1)(-6k-1)
(x+10)(x-10)(3x-6y)(3x+6y)
(7+8x)(7-8x)3x2-(y+4x)(y-4x)
(1-a)(1+a)(0.8x+0.6)(0.8x-0.6)
(a+4)(a-4)(x+1)(x-1)(x2+1)
(ab+5)(ab-5)(a+8)(a-8)(a2+64)
(-3m-4n)(-3m+4n)(an+6b)(an-6b)
(x+3y)(x-3y)(2mn-4n)(2mn+4n)
(y+2z)(y-2z)(-4x-y)(-4x+y)
(9x+1)(9x-1)(8x-4y)(8x+4y)
(-4x+1)(-4x-1)(5a-5b)(5a+5b)
(1-2a)(1+2a)(0.4x+0.1)(0.4x-0.1)
(5m-3n)(5m+3n)+6n2(-6k+7)(-6k-7)
(3x+3)(3x-3)(3x-4y)(3x+4y)
(7+7x)(7-7x)9x2+(y+3x)(y-3x)
(7-3a)(7+3a)(0.7x+0.2)(0.7x-0.2)
(a+4)(a-4)(x+3)(x-3)(x2+9)
(ab+5)(ab-5)(a+1)(a-1)(a2+1)
(-m-4n)(-m+4n)(an+5b)(an-5b)
(x+5y)(x-5y)(8mn-5n)(8mn+5n)
(y+2z)(y-2z)(-x-4y)(-x+4y)
(9x+9)(9x-9)(5x-8y)(5x+8y)
(-6x+5)(-6x-5)(6a-b)(6a+b)
(7-3a)(7+3a)(0.1x+0.8)(0.1x-0.8)
(m-3n)(m+3n)+8n2(-7k+2)(-7k-2)
(4x+8)(4x-8)(4x-3y)(4x+3y)
(6+7x)(6-7x)3x2-(y+4x)(y-4x)
(10-6a)(10+6a)(0.1x+0.4)(0.1x-0.4)
(a+6)(a-6)(x+4)(x-4)(x2+16)
(ab+2)(ab-2)(a+6)(a-6)(a2+36)
(-7m-4n)(-7m+4n)(an+8b)(an-8b)
(x+8y)(x-8y)(3mn-4n)(3mn+4n)
(y+9z)(y-9z)(-6x-4y)(-6x+4y)
(x+5)(x-5)(3x-y)(3x+y)
(-7x+8)(-7x-8)(7a-2b)(7a+2b)
(10-5a)(10+5a)(0.8x+0.4)(0.8x-0.4)
(5m-5n)(5m+5n)+8n2(-k+9)(-k-9)
(4x+9)(4x-9)(2x-5y)(2x+5y)
(10+4x)(10-4x)3x2+(y+3x)(y-3x)
(3-9a)(3+9a)(0.5x+0.5)(0.5x-0.5)
(a+1)(a-1)(x+9)(x-9)(x2+81)
(ab+7)(ab-7)(a+2)(a-2)(a2+4)
(-2m-3n)(-2m+3n)(an+6b)(an-6b)
(x+5y)(x-5y)(4mn-2n)(4mn+2n)
(y+5z)(y-5z)(-x-y)(-x+y)
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