2x(x-1)=4x-3 求x

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/24 19:31:28
2x(x-1)=4x-3求x2x(x-1)=4x-3求x2x(x-1)=4x-3求x(3+√3)/2或(3-√3)/22x(x-1)=4x-32x-2=4x-31=3x-2xx=0.52x^2-2x=

2x(x-1)=4x-3 求x
2x(x-1)=4x-3 求x

2x(x-1)=4x-3 求x
(3+√3)/2或(3-√3)/2

2x(x-1)=4x-3
2x-2=4x-3
1=3x-2x
x=0.5

2x^2-2x=4x-3
2x^2-6x+3=0
x^2-3x+1.5=0
x^2-3x+1.5^2-1.5^2+1.5=0
(x-1.5)^2-0.75=0
(x-1.5)^2=0.75
x-1.5=±0.75^0.5
x=1.5±0.75^0.5
x=3/2±√3/2
中间不想打分数和√就用 小数 和 ^0.5 代替了。

x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求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 5x-3(2x+1)=6x-4(5-3x)求x 5x-3(2x+1)=6x-4(5-3x)求x 2(5x-4)-3(x+6)=5(x-1)-x 求x. 已知x^-x-1=0,求x^4+x^3-x^2-4x+3 (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? 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, 已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10| 已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 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 || 1/(x+1)(x+2)+1/(x+2)(x+3)+(x+3)(x+4)+.+1/(x+2005)(x+2006)=1/2x+4012 求X 已知1/√(x)+√(x)=√5,求√(x/x2+x+1)+√(x/x2-x+1)的值定义域 x>0,两边平方,x+2+1/x=5,x+1/x=3,x^2-3x+1=0,x^2+x+1-4x=0,x^2+x+1=4x,x^2-x+1-2x=0.x^2-x+1=2x,√[x/(x^2+x+1)]-√[x/(x^2-x+1)]=√[x/(4x)]-√[x/2x]=√(1/4)-√(1/2) 若x^3+x^2+x+1=0,求代数式1+x+x^2+x^3+x^4+x^5+...+x^2006+x^2007的值 已知x^4+x^3+x^3+x^2+x^1+1=0,求x^100+x^99+x^98+x^97+x^96的值 (1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8(2) 已知x+3/(x-2)^2=A/x-2 + B/(x-2)^2 ,求A和B的值.