X3+6X2+12X-8=0X=?3、2均为指数

X3+6X2+12X-8=0X=?3、2均为指数 已知x2+5x-4=0,求x3+6x2+x+2的值已知x2+x-1=0,求x3+2x2+3的值 若 x2-3x+1=0,求（2x2×x3-5x2×x2+2 x3-8x2 ）÷（x2+1 ）的值 x2+3x-2=0,求2x3+6x2-4x的值 已知x2-3x+1=0,求x4-6x3+4x2+15x+2 6x+5x2-3x3+2x-7x3,其中x=-5 2x3+4x- x2-(x+x2-2x3) ,其中x= -3 DIvide x3+x2-14x-24 by x+2Solution x2-x-12/)x-2)x3+x2-14x-24x3+2x/-2x2-14x-x2-2x/-12x-24-12x-24/0In this example we see that x+2 is a factor of x3+x2-14x-24,as the remainder is zero.Thus x3+x2-14x-24÷（x+2）=x2-x-12 with zero remainderso x3+x2-14x x2-x-1=0,-x3+2x2+2008= 解方程x3-4x3+2x-3=0x3-4x2+2x-3=0 x3-x2-3x+2=0怎么解 x3+3x2+2x=0这么解啊? 1.用基础解系表示线性方程组的通解X1 +2X2+3X3-X4=13X1+2X+X3-X4=1 2X1+3X2+X3+X4=12X1+2X2+2X3-X4=15X1+5X2+2X3=22.3 1 0A= -4 -1 0 的特征值和特征向量.4 -8 2 1.用基础解系表示线性方程组的通解X1 +2X2+3X3-X4=13X1+2X2+X3-X [x3-3x2+( )-1]+[( )-6x2-2x+( )]=2x3+( )+2x+2是 3次 2次 X3+6X2+8X=1680,X3是X的3次方的意思,同样,X2是X的2次方的意思. X3+3X+2X3-3X2-3X3+3X2+3X=12这是解方程 X=未知数XX后面的都是次数 已知x2+x+1=0则x3+2x2+2x-6= 已知x2-3x-1=0求x3-3x2-11x+8的值