x^4-2x^3-3x^2+4x-12=0速度,

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x^4-2x^3-3x^2+4x-12=0速度,x^4-2x^3-3x^2+4x-12=0速度,x^4-2x^3-3x^2+4x-12=0速度,(x^4-2x^3+x^2)-4x^2+4x-12=0x

x^4-2x^3-3x^2+4x-12=0速度,
x^4-2x^3-3x^2+4x-12=0速度,

x^4-2x^3-3x^2+4x-12=0速度,
(x^4-2x^3+x^2)-4x^2+4x-12=0
x^2(x-1)^2-(4x^2-8x+4)-4x-8=0
x^2(x-1)^2-4(x-1)^2-4(x+2)=0
(x^2-4)(x-1)^2 -4(x+2)=0
(x+2)[(x-2)(x-1)^2-4]=0
(x+2)(x^3-4x^2+5x-6)=0
(x+2)[(x^3-3x^2)-(x^2-5x+6)]=0
(x+2)[x^2(x-3)-(x-2)(x-3)]=0
(x+2)(x-3)(x^2-x+2)=0
因为x^2-x+2恒正,实根只有两个:
x=-2 或 x=3

x^2(x^2-2x-3)+4(x-3)=x^2(x-3)(x+1)+4(x-3)=(x-3)(x^3+x^2+4)

*-----------------------------------------------*| 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 || 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X 4x+2x+x-3x=12 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+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? (4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60) (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) x-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程通分:x+4/x^2-8x+15,x-5/x^2+x-12,x-3/x^2-x-20 X+X+X+(X-1)+(X-2)+(X-3)+(X-4)=10(X-3)+(X-4) x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002 x^2-3x=x-4 4x-2(x-3)=x x(x-4)=-3 x^2