要求,（-x+2x^2+5)+(4x^2-3-6x)= （3a^2-ab+7)-(-4ab^2+2ab+7)

*-----------------------------------------------*| 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 || 化简 [(x+2)/(x^2-2x)-(x-1)/(x^2-4x+4)]/[(x-4)/x]要求要过程. 计算(x+3/x+4)-- (x+4/x+5)=(x+1/x+2)--(x+2/X+3) 要求初中知识 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) 用拆项添项法因式分解!x^2+5x+6x^2+7x+6x^2+5x+4x^2-5x+6x^2-7x+6x^2-5x+4x^2+3x+2x^2-3x+2x^2-4x+3要求用拆项添项解答！必须的！新人没那么多积分可以给 (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 3x^2-x=4 要求十字相乘解, 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 已知x= -1-√2,求x^5+4x^4+6x^3+6x²+2x+3的值.要求详细答案,谢谢 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 解方程：5x+3（9-x）=41 5x+10(25-x）=170 2x+4(10-x)=32 急 要求, 1、x4次方-4x^+4x-1 2、x3次方-4x^+4x-1 3、(x^-x)^-8(x-2)(x+1)-4 要求因式分解 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