4(2X+|)-9=0

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4(2X+|)-9=0
4(2X+|)-9=0

4(2X+|)-9=0

4(2X+1)-9=0
∴8X+4-9=0
8X-5=0
8X=5
X=5分之8

x/a^2-bx+x/b=1 (a,b不等于0)x-8/x-3-x-9/x-4=1/x+3-1/x+8 解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) (x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2) 2x²+3x-18=0 3x²+2x-5=0 x²-4x-7=0.解一元二 因式分解法解下列方程 1、用因式分解法解下列方程:(1)3y^2-5y=0 (2)4x^2=12x (3)x^2+9=-6x (4)9x^2=(x-x^3-3x^2-13x+15 =x^3-3x^2+2x-15x+15 =x(x^2-3x+2)-15(x-1) =x(x-2)(x-1)-15(x-1) =(x-1)[x(x-2)-15] =(x-1)[x^2-2x-15] =(x-1)(x-5)(x+ matlab解数值分析题p=(x-1)*(x-2)*(x-3)*(x-4)*(x-5)*(x-6)*(x-7)*(x-8)*(x-9)*(x-10)*(x-11)*(x-12)*(x-13)*(x-14)*(x-15)*(x-16)*(x-17)*(x-18)*(x-19)*(x-20)解为1,2,3……,20取多个非常小的数用软件工具求解方程p(x)+n*x^19=0,并 (X-3分之x-1-x分之x-4)除以x的平方+3x分之(x+3)(x-2),其中(x-1)(x-2)=0 (X-1)(X-2)(X+2)(X+3)=60(X-1)(X-2)(X-3)(X-4)+1=0(X-5)/(X-6)+(X-8)/(X-9)=(X-7)/(X-8)+(X-6)/(X-7) 设x>0,且x方-2x-9=0,求lg(x方+x-6)-lg(x方+4x+15)的值 解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x- (1)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(2)计算:1/(X+2)+1/(X+1)(X+3)+1/(X+2)(X+4)+.+1/(X+2007)(X+2009)一楼的:题没有错唉~二楼的: 求函数f(x)=(x^2+4x+9)/x (x>0) 的最小值 有几道计算题,⊙ o ⊙ )6x²+2x=0x²-8x+11=0(x²-x)²-8(x²-x)+12=02x(x-1)+3=(x+1)²(x-5)(x+6)=(x-5)9(x-3)²-4(x+2)²=0(x+1)(x-2)+(2x+1)(x-1)=0 解分式方程(化为一元二次方程) 1.x^2+2/x+6x/x^2+2=5 2.x^2-9/1+3x/1=x^2+6x+9 3.x^2+x+1=x^2+x/24.2(x^2+x^2/1)-(x+x/1)+1=0 5.x^4+x^4/1=x^2+X^2/1 能做多少就多少,写出最简公分母, 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 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) 设常数a>=0 解方程x*x*x*x+6x*x*x+(9-2a)x*x-6ax+a*a-4=0 解方程4x^2+2x√(3x^+x)+x-9=0 x²+x+2x√(x+2)=144x²+2x√(3x²+x)+x-9=0