(x^2-3x+1)^3怎么算出x^6-9x^5+30x^4-45x^3+30x^2-9x+1

(x^2-3x+1)^3怎么算出x^6-9x^5+30x^4-45x^3+30x^2-9x+1 (x+2)(x+3)-(x+6)(x-1) 怎么算? (X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2)怎么算?(X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2),怎么算? (x-1)(x+2)(x+3)(x+6)怎么做? *-----------------------------------------------*| 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 || 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 x^2+3x-6=0解出x (x-1)(x-2)(x-3)(x-4)-(x^2-5x)^2-10(x^2-5x)怎么算? x^8+x^7+x^6+x^5+x^4+x^3+x^2+x+1怎么分解因式 cos 2x -(cos 2x)^3怎么算出(sin 2x)^2 *cos 2x 求下列函数的驻点,极值和对应的极值(1)f(x)=2x^2-6x+1(2)g(x)=cosx+x/2(3)f(x)=2x^3+3^2+6x-7(4)h(x)=x^2e^x还有第一小题,我算出了只有一个驻点,该怎么求极值? 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少 x-1分之x-3 加 x+1分之x+3 等于 x+2分之x+6 加 x-2加x-6 怎么算 1/(x+1)(x+2)+1/(x+3)(x+4)+1/(x+5)(x+6)+1/(x+7)(x+8)+1/(x+9)(x+10)怎么解 已知x^2-4X+1=0,求x^5-6x^4+7x^3-4x^2+38x+1的值,怎么做?要说出过程 x-1+x-2+x-3+x-4+x-5+x-6+x-7=77怎么解速度! (2x+1)²-(x+3)(3-x)=6x怎么简便算? [x+2][x+3]减去[x+6][x减1]怎么算.