求(6x+5)(6x-5)-(4x+3)(9x-5)=-20

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 *-----------------------------------------------*| 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-1/+/x-2/+/x-3/x-4/+/x-5/ +/x-6/求最小值 (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? 如果1+x+x^2+x^3=0,求x+x^2+X^3+x^4+x^5+x^6+x^7+x^8的值, 已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10| 已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) (x+2)(x-1)+(x+3)(x+1)=x·x-1 求x (5x-4)(2x+5)(3x-6)(2x-4)=(2x-4)(2x+5)·0.5 求x x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? 设x= -5/2,求6x+(x/x-2 - x/x+2)/4x/x^4-2x^3+8x-16的值 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少 若x*x+x+1+0,求x^7+2x^6+x^5+x^4+x^3+x*x+1的值 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 有一列单项式,:-x,2x,-3x,4x,-5x,6x,-7x.求排列规律 有一列单项式,:-x,2x,-3x,4x,-5x,6x,-7x.求排列规律? 已知x+x^2+x^3+x^4+x^5+x^6=4.4,求x 请解题, 若x+x^2+x^3+x^4=0.求x^5+x^6+…+x^2004的值 (x+3x+5x...+2009x)-(2x+4x+6x+...+2010x)