怎么解12(x-1)(x 3)-2(2x-5)(3x-2)>0不等式

(2x-3)(3x-2)-x(6x-1)+12(x-1)怎么解 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 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 x-1+x-2+x-3+x-4+x-5+x-6+x-7=77怎么解速度! 怎么解12(x-1)(x 3)-2(2x-5)(3x-2)>0不等式 (x-1/3x-12)-(1/4x+15)=1/2x+53怎么解 x*x+2*x+1=36,x怎么解, (x+2)(x+3)-(x+6)(x-1) 怎么算? (x-1)(x+2)(x+3)(x+6)怎么做? 2x-(x+3-3(x+1)怎么解 3x(x^2-2x+1)-2x^2(x+1)这道题怎么解 (3)/(x)+(5)/(2x-1)=(x+27)/2x^2-x怎么解啊! (x+1)(x+3)+8x>(x+5)(x-5)-2怎么解 1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)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 || 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 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(X-1)+2X(X+1)-3X(2X-5)这道题目怎么解?X(X-1)+2X(X+1)-3X(2X-5)这道题目怎么解?