(2x-5)^2-(x+4)^2=0,

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/22 17:36:37
(2x-5)^2-(x+4)^2=0,(2x-5)^2-(x+4)^2=0,(2x-5)^2-(x+4)^2=0,(2x-5)^2-(x+4)^2=0[(2x-5)+(x+4)][(2x-5)-(x+

(2x-5)^2-(x+4)^2=0,
(2x-5)^2-(x+4)^2=0,

(2x-5)^2-(x+4)^2=0,
(2x-5)^2-(x+4)^2=0
[(2x-5)+(x+4)][(2x-5)-(x+4)]=0
[2x-5+x+4][2x-5-x-4]=0
[3x-1][x-9]=0
3x-1=0或x-9=0
所以
x=1/3或9.

(2x-5)^2-(x+4)^2=0
(2x-5-x-4)(2x-5+x+4)=0
(x-9)(3x-1)=0
x=9 or x=1/3

(2x-5)^2-(x+4)^2=0
[(2x-5)+(x+4)][(2x-5)-(x+4)]=0
(3x-1)(x-9)=0
x=1/3或x=9

X^2-2X-4=0 X(X-7)=5X-36 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) 一元二次方程解答!x(5x+4)=5x+44x^2-45=31x-3x^2+22x-24=0(x+8)(x+1)= -12(3x+2)(x+3)=x+14 1、1/2x=2/x+32、x/x+1=(2x/3x+3)+13、2/x-1=4/x²-14、5/x²+x-1/x²-x=0 解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 (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 1.x^2-x-202.(x-4)(x+5)=4-x3.x^2+6x-5=04.2x^2-4x-1=0 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- x+5/x+1-3x-3/x+5=8x+28/x^2+4X-5-2(x+5)/(x+1)-(3x-3)/(x+5)=(8x+28)/(x^2+4X-5)-2 300字读后感 2篇 俄把格式说一下吧:《xxxx》(写题目)主要内容:x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x(写那篇文章的主要内容)思考分析:x x x (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 用(公式法)解方程:x²+x-2=0 x²-4x+2=0 4x²-3x-5=x-2 3x(x-3)=2(x-1)(x+1),①x²+x-2=0 ②x²-4x+2=0③4x²-3x-5=x-2④3x(x-3)=2(x-1)(x+1) 解分式方程(要带步骤)解方程:(1):2/(x-3)=3/x; (2):6/(1-x)-(x+5)/[x(1-x)]=0; (3):2/(3x-1)-1=3/(6x-2); (4):10x/(2x-1)+5/(1-2x)=2; (5):(x+2)²/x²-3(x+2)/x+2=0; (6)x/(x²-4)+2/(x+2)=1/(x-2); (7)5/(x²+x)-1/(x²- 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+ x(x^2-1)+2x^2 *(x+1)-3x*(2x-5)=x(3x^2-4x)-28 X+X+2+X+4-(X+4)=26 (16x^4+4x^2+x)/x=? (2x-2)(x-1)=0 x(x-5)=5x-10