(a+b)²-c² x² -6x+94a² +4ab+b² -9x² +12xy-4y² a² +ab+1/4b² (2a+b)² -8(2a+b)+16(x+z)² -(x-z)² -3x+6x² -3x³(a-b)² -1005a² -20b² a² (x-y)+b² (y-x)8a³-
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![(a+b)²-c² x² -6x+94a² +4ab+b² -9x² +12xy-4y² a² +ab+1/4b² (2a+b)² -8(2a+b)+16(x+z)² -(x-z)² -3x+6x² -3x³(a-b)² -1005a² -20b² a² (x-y)+b² (y-x)8a³-](/uploads/image/z/6849993-57-3.jpg?t=%28a%2Bb%29%26%23178%3B-c%26%23178%3B+x%26%23178%3B+-6x%2B94a%26%23178%3B+%2B4ab%2Bb%26%23178%3B+-9x%26%23178%3B+%2B12xy-4y%26%23178%3B+a%26%23178%3B+%2Bab%2B1%2F4b%26%23178%3B+%282a%2Bb%29%26%23178%3B+-8%282a%2Bb%29%2B16%28x%2Bz%29%26%23178%3B+-%28x-z%29%26%23178%3B+-3x%2B6x%26%23178%3B+-3x%26%23179%3B%EF%BC%88a-b%EF%BC%89%26%23178%3B+-1005a%26%23178%3B+-20b%26%23178%3B+a%26%23178%3B+%28x-y%29%2Bb%26%23178%3B+%28y-x%298a%26%23179%3B-)
(a+b)²-c² x² -6x+94a² +4ab+b² -9x² +12xy-4y² a² +ab+1/4b² (2a+b)² -8(2a+b)+16(x+z)² -(x-z)² -3x+6x² -3x³(a-b)² -1005a² -20b² a² (x-y)+b² (y-x)8a³-
(a+b)²-c²
x² -6x+9
4a² +4ab+b²
-9x² +12xy-4y²
a² +ab+1/4b²
(2a+b)² -8(2a+b)+16
(x+z)² -(x-z)²
-3x+6x² -3x³
(a-b)² -100
5a² -20b²
a² (x-y)+b² (y-x)
8a³-2a
314² -214²
2005+2005² -2006²
(a+b)²-c² x² -6x+94a² +4ab+b² -9x² +12xy-4y² a² +ab+1/4b² (2a+b)² -8(2a+b)+16(x+z)² -(x-z)² -3x+6x² -3x³(a-b)² -1005a² -20b² a² (x-y)+b² (y-x)8a³-
(a+b)²-c²
=(a+b+c)(a+b-c)
x² -6x+9
=(x-3)²
4a² +4ab+b²
=(2a+b)²
-9x² +12xy-4y²
=-(3x-2y)²
a² +ab+1/4b²这里应该是b²/4
=(a+b/2)²
(2a+b)² -8(2a+b)+16
=(2a+b-4)²
(x+z)² -(x-z)²
=(x+z+x-z)(x+z-x+z)
=2x×2z
=4xz
-3x+6x² -3x³
=-3x(x²-2x+1)
=-3x(x-1)²
(a-b)² -100
=(a-b+10)(a-b-10)
5a² -20b²
=5(a+2b)(a-2b)
a² (x-y)+b² (y-x)
=(x-y)(a²-b²)
=(x-y)(a+b)(a-b)
8a³-2a
=2a(2a+1)(2a-1)
314² -214²
=(314+214)(314-214)
=528×100
=52800
2005+2005² -2006²
=2005+(2005-2006)(2005+2006)
=2005-2005-2006
=-2006