\(a,\Leftrightarrow\left(4x-8\right)\left(x+1\right)=0\\ \Leftrightarrow4\left(x-2\right)\left(x+1\right)=0\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-1\end{matrix}\right.\\ b,\Leftrightarrow\left(x+1\right)\left(x^2+1\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}x=-1\\x^2=-1\left(vô.lí\right)\end{matrix}\right.\Leftrightarrow x=-1\\ c,\Leftrightarrow x^2-2x-4x+8=0\\ \Leftrightarrow\left(x-2\right)\left(x-4\right)=0\Leftrightarrow\left[{}\begin{matrix}x=2\\x=4\end{matrix}\right.\\ d,\Leftrightarrow x^3-3x^2+3x-9x+2x-6=0\\ \Leftrightarrow\left(x-3\right)\left(x^2+3x+2\right)=0\\ \Leftrightarrow\left(x-3\right)\left(x^2+x+2x+2\right)=0\\ \Leftrightarrow\left(x-3\right)\left(x+1\right)\left(x+2\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}x=3\\x=-1\\x=-2\end{matrix}\right.\)

a) \(\Rightarrow4\left(x+1\right)\left(x-2\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x=-1\\x=2\end{matrix}\right.\)

b) \(\Rightarrow x^2\left(x+1\right)+\left(x+1\right)=0\)

\(\Rightarrow\left(x+1\right)\left(x^2+1\right)=0\)

\(\Rightarrow x=-1\left(do.x^2+1\ge1>0\right)\)

c) \(\Rightarrow x\left(x-4\right)-2\left(x-4\right)=0\)

\(\Rightarrow\left(x-4\right)\left(x-2\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x=4\\x=2\end{matrix}\right.\)

d) \(\Rightarrow x^2\left(x-3\right)+3x\left(x-3\right)+2\left(x-3\right)\)

\(\Rightarrow\left(x-3\right)\left(x^2+3x+2\right)=0\)

\(\Rightarrow\left(x-3\right)\left(x+1\right)\left(x+2\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x=3\\x=-2\\x=-1\end{matrix}\right.\)

a/

4x:17=0

4x=0x17

4x=0

x=0:4

x=0

a. 4x : 17 = 0 <=> 4x = 0.17 = 0 => x = 0

b. 7x- 8 =713 <=> 7x = 713 + 8 = 721 => x = 721 : 7 = 103

c. 8 ( x - 3) = 0 <=> x - 3 = 0: 8 = 0 => x = 3

d. 0 : x = 0 với mọi x khác 0

a, x= 103

b, x= 3

c,x=0

Nếu thấy đúng thì k cho mk nhé!

a)7x-8=713

  7x        =713+8

   7x     =721

   x      =721:7

  x      =103

Vậy x=103

b)8(x-3)=0

     x-3=0:8

     x-3=0

     x=0+3

     x=3

Vậy x=0

4x:7=0

4x   =0*7

4x   =0

  x   =0:4

  x  =0

Vậy x=0

a/ 7x - 8 = 713

    7x      = 713 + 8

    7x      = 721

     x       = 721 : 7

     x       =  103

b/ 8 ( x -3 ) = 0

        x - 3  = 0

        x       = 0+3

        x       = 3

4x : 17 = 0

4x        = 0 x 17

4 x       = 0

   x        = 0

a) 4x:17=0

    4x=0x17

    4x=0

      x=0:4

       x=0

b)7x-8=713

7x=213+8

7x=221

  x=221:7

  x=221/7

c)8(x-3)=0

8x - 8x3 = 0

8x -24=0

8x=0+24

8x=24

  x=24:8

   x=3

4x:17=0

4x=0.17

4x=0

x=0:4

x=0

7x-8=713

7x=713+8

7x=721

x=721:7

x=103

8(x-3)=0

x-3=0:8

x-3=0

x=0+3

x=3

7x-8=713                          8(x-3)=0                                     4x:17=0

7x=713+8                           =>x-3=0                                     =>4x=0

7x=721                                  =.x=3                                       =>x=0

x=721:7

x=103

7x-8=713                             8(x-3)=0                      4x÷17=0

7x=713+8                              x-3=0÷8                     4x=17×0

7x=​721                                x-3=0                             4x=0

x=721÷7                             x=3+0  ;                              x=0÷4

x=103                                  x=3                                     x=0

Bài đó bằng 21 mà

a/ x=0

b/ x=705/7

c/ x=-3

0

.4x : 17 = 0 

<=> 4x = 17

<=> x = 17/4 = 4,25

7x - 8 = 713

<=> 7x = 713 + 8

<=> x = 103

8 ( x - 3 ) = 0

<=> 8x - 24 = 0

<=> 8x = 24

<=> x = 4

.

.

.

.

4x:17=0                                                  7x-8=713                                                   8(x-3)=0

4x=0.17=0                                              7x=713+8=721                                             x-3=0:8=0

x=0:4=0                                                  x=721:7=103                                               x=0+3=3

Vậy x=0                                                 Vậy x=103                                                 Vậy x=3

a) \(4x:17=0\)

\(4x=0\)

\(x=0\)

vay \(x=0\)

b) \(7x-8=713\)

\(7x=713+8\)

\(7x=721\)

\(x=103\)

vay \(x=103\)

c) \(8\left(x-3\right)=0\)

\(8x-24=0\)

\(8x=24\)

\(x=3\)

vay \(x=3\)

d) \(0:x=0\)

\(\Rightarrow x\in R\) va \(x\ne0\)

vay \(x\in R\)va \(x\ne0\)

a)x=0

b)x=103

c)x=3

d)x thuộc R

a, 4x : 17 = 0

=>4x        = 0

      x        = 0 : 4

      x         = 0

Vậy x = 0 .

b, 7x - 8 = 713

   7x      = 713 + 8

    7x     = 721

      x     = 721 : 7

      x     = 103

Vậy x = 103 .

c, 8( x - 3 ) = 0

=>   x - 3    = 0

       x         = 0 + 3

       x         = 3

Vậy x = 3 .

d, 0 : x = 0 

=> x là các số tự nhiên khác 0 

=> X ∈ N*

Chúc học tốt !