求解初一几道平方差的题.- -.704×696x(x-1)-(x-2y)+(x+1)(x-1)x(x-1)-(x-1/3)(x-1/3)(2m+3)(2m-3)x(x+1)+(2-x)(2+x)(3x-y)(3x+y)+y(x+y)(a+1/2b)(a-1/2b)-(3a-2b)(3a+2b)1007×993108x112
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![求解初一几道平方差的题.- -.704×696x(x-1)-(x-2y)+(x+1)(x-1)x(x-1)-(x-1/3)(x-1/3)(2m+3)(2m-3)x(x+1)+(2-x)(2+x)(3x-y)(3x+y)+y(x+y)(a+1/2b)(a-1/2b)-(3a-2b)(3a+2b)1007×993108x112](/uploads/image/z/7621776-0-6.jpg?t=%E6%B1%82%E8%A7%A3%E5%88%9D%E4%B8%80%E5%87%A0%E9%81%93%E5%B9%B3%E6%96%B9%E5%B7%AE%E7%9A%84%E9%A2%98.-+-.704%C3%97696x%EF%BC%88x-1%29-%28x-2y%29%2B%28x%2B1%29%28x-1%29x%28x-1%29-%28x-1%2F3%29%28x-1%2F3%29%282m%2B3%29%282m-3%29x%EF%BC%88x%2B1%29%2B%282-x%29%282%2Bx%29%283x-y%29%283x%2By%29%2By%28x%2By%29%28a%2B1%2F2b%29%28a-1%2F2b%29-%283a-2b%29%283a%2B2b%291007%C3%97993108x112)
求解初一几道平方差的题.- -.704×696x(x-1)-(x-2y)+(x+1)(x-1)x(x-1)-(x-1/3)(x-1/3)(2m+3)(2m-3)x(x+1)+(2-x)(2+x)(3x-y)(3x+y)+y(x+y)(a+1/2b)(a-1/2b)-(3a-2b)(3a+2b)1007×993108x112
求解初一几道平方差的题.- -.
704×696
x(x-1)-(x-2y)+(x+1)(x-1)
x(x-1)-(x-1/3)(x-1/3)
(2m+3)(2m-3)
x(x+1)+(2-x)(2+x)
(3x-y)(3x+y)+y(x+y)
(a+1/2b)(a-1/2b)-(3a-2b)(3a+2b)
1007×993
108x112
求解初一几道平方差的题.- -.704×696x(x-1)-(x-2y)+(x+1)(x-1)x(x-1)-(x-1/3)(x-1/3)(2m+3)(2m-3)x(x+1)+(2-x)(2+x)(3x-y)(3x+y)+y(x+y)(a+1/2b)(a-1/2b)-(3a-2b)(3a+2b)1007×993108x112
1 (700+4)*(700-4)
3 X的平方 -X-X的平方+1/9=1/9-X
4 (2m)的平方-9
X的平方+X-X的平方+4=4+X
9X的平方-Y的平方+XY+Y的平方=9X的平方+XY
a的平方-1/4b的平方-9a的平方+4b的平方=11/4b的平方-8a的平方
(1000+7)*(1000-7)
(110-2)*(110+2)
①704×696=(700+4)×(700-4)=700²-4²=489984
②x(x-1)-(x-2y)+(x+1)(x-1)=(x-1)(x-x+2y)=2xy-2y
下面的都一样
1 (700+4)*(700-4)
3 X的平方 -X-X的平方+1/9=1/9-X
4 (2m)的平方-9
X的平方+X-X的平方+4=4+X
9X的平方-Y的平方+XY+Y的平方=9X的平方+XY
a的平方-1/4b的平方-9a的平方+4b的平方=11/4b的平方-8a的平方
(1000+7)*(1000-7)
(110-2)*(110+2)