X^3 + 3(X^2)-3X-9=0 X1=-3 X2=根号3 X3= - 根号3

x(x*x-6x-9)-x(x*x-8x-15)+2x(3-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 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 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? x×x+3x-9/ x+2 3*X*X*X+3*X*X-3x-9=0 x=? X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一 x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002 (x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8 用MATLAB求解以下优化问题设计变量：X = {x1,x2 ,x3 ,x4}T约束条件：g1( X )=-x(1)* x(1)-x(2)* x(2)- x(3)* x(3)- x(4)* x(4)- x(1)+ x(2)- x(3)+x(4)+9≥0g2( X )=-x(1)*x(1)-2*x(2)*x(2)-x(3)*x(3)-2*x(4)*x(4)+x(1)+x(4)+8≥0g3( X )= -2*x(1) [2x/(x-3)-x/(x+3)]/ x/(9-x^2) 其中x是方程x^2-2x-3=0的跟 先化简再求值 4x=2x x+(x-3)=9 (x-2)(x-4)+4x(x-3)=0 (x+2)(x-3)(x-6)(x-1)=0 x²+x+2x√（x+2）=144x²+2x√（3x²+x)+x-9=0 1/x+1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...1/(x+9)(x+10)=0 解方程:1/x+1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+……+1/(x+9)(x+10)=0 解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)