2(x+4)^2-(x+5)^2-(x+3)(x-3)怎么化简?有没有简便方法
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/31 15:26:29
2(x+4)^2-(x+5)^2-(x+3)(x-3)怎么化简?有没有简便方法2(x+4)^2-(x+5)^2-(x+3)(x-3)怎么化简?有没有简便方法2(x+4)^2-(x+5)^2-(x+3)
2(x+4)^2-(x+5)^2-(x+3)(x-3)怎么化简?有没有简便方法
2(x+4)^2-(x+5)^2-(x+3)(x-3)怎么化简?有没有简便方法
2(x+4)^2-(x+5)^2-(x+3)(x-3)怎么化简?有没有简便方法
2(x+4)^2-(x+5)^2-(x+3)(x-3) =(x+4)^2-(x+5)^2+(x+4)^2-(x^2-9) =(x+4+x+5)(x+4-x-5)+(x+4)^2-x^2+9 =(2x+9)(-1)+(x+4-x)(x+4+x)+9 =-2x-9+4(2x+4)+9 =-2x+4(2x+4) =6x+16
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
通分x+4/x*x+4x与x-5/x(x-5)-2(x-5)
(x+3x+5x...+2009x)-(2x+4x+6x+...+2010x)
x^5-x^4+x^3-x^2+x-1
x^6-x^5+x^4-x^2+x-1
求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
难倒爱因斯坦的九宫格X 7 X | X 8 1 | X X X |X X X | X 4 X | 7 5 9 |X X 5 | 7 X 9 | X 1 4 |5 X X | X X 8 | 3 9 X |3 9 6 | 4 X 7 | X X 2 |X 8 7 | 9 X X | X X X |4 X X | 6 X 5 | X X X | X X 4 | X X 1 |2 X X | X X X | X X X | X 3 X | X X X |X 6
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
如下9*9宫图如何填x x x 1 x x x 2 9x x 5 x x x x x 4x 6 8 x x x x x xx x x 7 x x 5 x xx 2 x x 6 x x 8 xx x 3 x x 9 x x xx x x x 5 x 1 6 x 4 x x x 3 x x x x 7 x x x x 2 x x x
(x/x-2-x/x+2)/4x/x-2
解九宫格题目（X为未知数）9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1
(x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3)
x-1分之x²+5x - x²-x分之2x²+4x
x-2x+3x-4x+5x.+99x-100x=25求解
化简：x-2x+3x-4x+5x-.+2011x-2002x
2x+3x+4x+5x+x+6x+7x=100