（x^2-3x）/(x^2-6x+9)约分

x(x*x-6x-9)-x(x*x-8x-15)+2x(3-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 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 *-----------------------------------------------*| 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 || f(x)=x^9+x^8+x^7+x^6+x^5+x^4+x^3+x^2+x+1在有理数域、实数域上的不可约多项式乘积 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 解方程（x-2）X（x的平方-6x-9）=x(x-5)X(x-3) 化简（x+2)(x的平方-6x-9）-（x-5)(x-3)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 分式乘除计算①x^2-y^2/x·-x^2/(x+y)^2 ②x^2-x/x+1÷x/x+1 额外：2a/4a有得约吗?①x^2-y^2/x·-x^2/(x+y)^2 ②x^2-x/x+1÷x/x+1 ③x^2-4y^2/3xy^3·xy/x+2y ④x^2+6x+9/x^2-9÷x+2/x-3 ⑤x^2+2xy+y^2/x^2-y^2额外：2a/4a有得约吗?刚学 x×x+3x-9/ x+2 x^2+9x/x^2+3x+x^2-9/x^2+6x+9 x+2/x^2-x-6 + 2x/x^3-3x - x+1/x^2-6x+9 计算:(x+2)/(x^2 - x - 6) + 2x/(x^2 - 3x) - x/(x^2 - 6x + 9) (x+2/x^2-x-6)-(2x/x^2-3x)-(x+1/x^2-6x+9) X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一