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x^2+2x-3/3+2x/4=x^2/3

Bài dài quá, lần sau chia nhỏ câu hỏi nhé!!!!!

đúng vậy

4, \(\Leftrightarrow4x+4+9\left(2x+1\right)=4x+6\left(x+1\right)+7+12x\)

\(\Leftrightarrow22x+13=22x+13\)vậy pt có vô số nghiệm 

5, \(\dfrac{2x}{3}+\dfrac{2x-1}{6}=4-\dfrac{x}{3}\Rightarrow4x+2x-1=24-2x\)

\(\Leftrightarrow8x=25\Leftrightarrow x=\dfrac{25}{8}\)

6, \(\dfrac{x-1}{2}+\dfrac{x-1}{4}=1-\dfrac{2\left(x-1\right)}{3}\Rightarrow6x-6+3x-3=12-8\left(x-1\right)\)

\(\Leftrightarrow9x-9=20-8x\Leftrightarrow17x=29\Leftrightarrow x=\dfrac{29}{17}\)

1: \(=x^4-8x^3+24x^2-32x+16+x^4-12x^3+54x^2-108x+81-1\)

\(=2x^4-20x^3+78x^2-140x+96\)

\(=2\left(x-3\right)\left(x-2\right)\left(x^2-5x+8\right)\)

2: \(=x^4-4x^3+6x^2-4x+1+x^4+12x^3+54x^2+108x+81-512\)

\(=2x^4+8x^3+60x^2+104x-430\)

\(=2\left(x^4+4x^3+30x^2+52x-215\right)\)

1) (x+6)(3x-1)+x+6=0

⇔(x+6)(3x-1)+(x+6)=0

⇔(x+6)(3x-1+1)=0

⇔3x(x+6)=0

2) (x+4)(5x+9)-x-4=0

⇔(x+4)(5x+9)-(x+4)=0

⇔(x+4)(5x+9-1)=0

⇔(x+4)(5x+8)=0

3)(1-x)(5x+3)÷(3x-7)(x-1)

=\(\frac{\left(1-x\right)\left(5x+3\right)}{\left(3x-7\right)\left(x-1\right)}=\frac{\left(1-x\right)\left(5x+3\right)}{\left(7-3x\right)\left(1-x\right)}=\frac{\left(5x+3\right)}{\left(7-3x\right)}\)

         Bài 1:

- \(\dfrac{11}{2}x\) + 1 = \(\dfrac{1}{3}x-\dfrac{1}{4}\)

- \(\dfrac{11}{2}\)\(x\) - \(\dfrac{1}{3}\)\(x\) = - \(\dfrac{1}{4}\) - 1

-(\(\dfrac{33}{6}\) + \(\dfrac{2}{6}\))\(x\) = - \(\dfrac{5}{4}\)

- \(\dfrac{35}{6}\)\(x\) = - \(\dfrac{5}{4}\)

  \(x=-\dfrac{5}{4}\) : (- \(\dfrac{35}{6}\))

 \(x\) = \(\dfrac{3}{14}\)

Vậy \(x=\dfrac{3}{14}\)

Bài 2: 2\(x\) - \(\dfrac{2}{3}\) - 7\(x\) = \(\dfrac{3}{2}\) - 1

         2\(x\) - 7\(x\) = \(\dfrac{3}{2}\) - 1 + \(\dfrac{2}{3}\)

         - 5\(x\)    = \(\dfrac{9}{6}\) - \(\dfrac{6}{6}\) + \(\dfrac{4}{6}\) 

        - 5\(x\)    = \(\dfrac{7}{6}\)

           \(x\)    = \(\dfrac{7}{6}\) : (- 5) 

          \(x\)    = - \(\dfrac{7}{30}\)

Vậy \(x=-\dfrac{7}{30}\)

Bài 3: \(\dfrac{3}{2}\)\(x\) - \(\dfrac{2}{5}\) = \(\dfrac{1}{3}x\) - \(\dfrac{1}{4}\)

           \(\dfrac{3}{2}\)\(x\) - \(\dfrac{1}{3}x\) = \(-\dfrac{1}{4}\) + \(\dfrac{2}{5}\)

           (\(\dfrac{9}{6}\) - \(\dfrac{2}{6}\))\(x\) = \(\dfrac{-5}{20}\) + \(\dfrac{8}{20}\)

            \(\dfrac{7}{6}x\)       = \(\dfrac{3}{20}\)

            \(x\)       = \(\dfrac{3}{20}\) : \(\dfrac{7}{6}\)

            \(x\)      = \(\dfrac{9}{70}\)

Vậy  \(x=\dfrac{9}{70}\)

1: =>x+1/2=0 hoặc 2/3-2x=0

=>x=-1/2 hoặc x=1/3

2: =>7/6x=5/2:3,75=2/3

=>x=2/3:7/6=2/3*6/7=12/21=4/7

3: =>2x-3=0 hoặc 6-2x=0

=>x=3 hoặc x=3/2

4: =>-5x-1-1/2x+1/3=3/2x-5/6

=>-11/2x-3/2x=-5/6-1/3+1

=>-7x=-1/6

=>x=1/42

Bài 1:

1. \(x-8=3-2\left(x+4\right)\)

\(x-8=3-2x-8\)

\(3x=3\Rightarrow x=1\)

2. \(2\left(x+3\right)-3\left(x-1\right)=2\)

\(2x+6-3x+3=2\)

\(-x+9=2\Rightarrow x=7\)

3. \(4\left(x-5\right)-\left(3x-1\right)=x-19\)

\(4x-20-3x+1=x-19\)

\(0x=0\Rightarrow x=0\)

4. \(7-\left(x-2\right)=5\left(2x-3\right)\)

\(7-x+2=10x-15\)

\(-11x=-24\Rightarrow x=\frac{24}{11}\)

5. \(32-4\left(0,5y-5\right)=3y+2\)

\(32-2y+20=3y+2\)

\(-5y=-50\Rightarrow y=10\)

6. \(3\left(x-1\right)-x=2x-3\)

\(3x-3-x=2x-3\)

\(0x=0\Rightarrow x=0\)

Bài 2:

1. \(\frac{2-x}{3}=\frac{3-2x}{5}\)

\(\frac{\left(2-x\right)5}{15}-\frac{\left(3-2x\right)3}{15}=0\)

\(\frac{10-5x-9+6x}{15}=0\)

\(x+1=0\Rightarrow x=-1\)

2. \(\frac{3-4x}{4}=\frac{x+2}{5}\)

\(\frac{5\left(3-4x\right)}{20}-\frac{4\left(x+2\right)}{20}=0\)

\(\frac{15-20x-4x-8}{20}=0\)

\(7-24x=0\)

\(24x=7\Rightarrow x=\frac{7}{24}\)

      c.   x^2-5x +6 = 0

<=> x^2 - 5x = -6

<=> - 4x = -6

<=> x= -6/-4

 Mình chỉ phân tích đa thức thành nhân tử thôi , phần còn lại bạn tự tính nha keo dài lắm

A)  2x²(x+3) - x(x+3) = 0  <=> x(x - 3)(2x-1)=0

B)  (2x+5)² - (x+2)²=0  <=>  (x+3)(3x+7)=0

C)  (x²-2x) - (3x-6)=0  <=> (x-2)(x-3)=0

D)  (2x-7)(2x-7-6x+18)=0   <=> (2x-7)(-4x+11)=0

E)  (x-2)(x+1) - (x-2)(x+2)=0   <=>  (x-2)*(-1)=0   <=> x-2=0

G)  (2x-3)(2x+2-5x)=0  <=> (2x-3)(-3x+2)=0

H)  (1-x)(5x+3+3x-7)=0     <=>  (1-x)(8x-4)=0

F)   (x+6)*3x=0

I)  (x-3)(4x-1-5x-2)=0  <=>  (x-3)(-x-3)=0

K)   (x+4)(5x+8)=0

H)  (x+3)(4x-9)=0

B> <2X+5>²-<X+2>²=0

<2X+5-X-2><2X+X+2>=0

<X+3><3X+7>=0

X+3=0 HOẶC 3X+7=0

X=-3 HOẶC X=-7/3

C>X²-5X+6=0

X²-4X+4-X+2=0

<X-2>²-<X-2>=0

<X-2.><X-3>=0

X-2=0 HOẶC X-3=0

X=2 HOẶC X=3

D> <2X-7><2X-7-6<X-3>>=0

<2X-7><-4X+11>=0

2X-7=0 HOẶC -4X+11=0

X=7/2 HOẶC X=11/4

E><X-2><X+1>=X²-4

<X-2><X+1>-<X²-4>=0

<X-2><X+1>-<X-2><X+2>=0

-X+2=0

X=2

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