3x-2x+1＜0

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 *-----------------------------------------------*| 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 || 设f(x)=x㏑(1+x^2),x≥0.(x^2+2x-3)e^(-x),x＜0,求∫f(x)dx x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002 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 七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式：X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X. 3x-2x+1＜0 x²-3x-18＜0 （x-1)(x+2)=(x-2)(2x+1) lim(x->0)((2-x)/(3-x))^1/x (x+2)(x-3)(x-6)(x-1)=0 两道有关符号问题题目｜x=2｜+｜x-3｜ x+2=0 x=-2 x-3=0 x=3x＜-2-x-2-x-3=-2x=1x＞3x+2+x-3=2x-1-2≤x≤3x=2-x+3=5｜x-1｜+｜x+1｜ x-1=0 x=1 x+1=0 x=-1 x≤-1-x+1-x+1=2-2xx＞1x-1+x+1=2x-1＜x≤11-x+x+1=2两道题目都是零点 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值 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, X^2-3X-2=0,求( x - 2x-1/x )÷(x-1)/(x^2-2x) 1/(x*x-2x-3)+2/(x*-x-6)+3/(x*x+3x+2)=0 (x-1)(x-2)(x+3)(x+4)>0和(x-1)(x-2)(x+3)(x+4) 已知X^2-X-1=0,则-X^3+2X+2006X^*X为什么=X^2+X 已知x^-x-1=0,求x^4+x^3-x^2-4x+3