Question

\(\left(2x-1\right)^3=27\)               tìm x thuộcN

Answer 1

            \(\left(2x-1\right)^3=27\)

            \(\left(2x-1\right)^3=3^3\)

          \(\Rightarrow2x-1=3\)

                \(2x=3+1\)

                 \(2x=4\)

                     \(x=4:2\)

                      \(x=2\)

   Chúc bn hok tốt

Answer 2

\(\left(2x-1\right)^3=27\)

\(\left(2x-1\right)^3=3^3\)

\(2x-1=3\)

\(2x=4\)

\(x=2\)

vậy x=3

Answer 3

( 2x - 1 )³ = 27

<=> ( 2x - 1 )³ = 3³

<=> 2x - 1 = 3

<=> 2x = 4

<=> x = 2

Vậy x = 2

Chúc bạn học tốt

Answer 4

\(\left(2x-1\right)^3=27\)

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

\(\Rightarrow2x-1=3\)

\(\Rightarrow2x=3+1\)

\(\Rightarrow2x=4\)

\(\Rightarrow x=4:2\)

\(\Rightarrow x=2\)

Vậy \(x=2\)

Answer 5

\(\left(2x-1\right)^3=27\)

\(\left(2x-1\right)^3=3^3\)

\(\Rightarrow2x-1=3\)

\(2x=3+1\)

\(2x=4\)

\(x=4:2\)

\(x=2\)

Vậy x =2

Answer 6

thanks các bạn

Answer 7

\(\left(2x-1\right)^3=27\)

\(\left(2x-1\right)^3=3^3\)

\(2x-1=3\)

\(2x=3+1\)

\(2x=4\)

\(x=4:2\)

\(x=2\)

Vậy \(x=2\)

Answer 8

(2x -1)³  = 27

(2x - 1)³ = 3³ 

=> 2x -1 = 3

=> 2x = 3-1 

=> 2x = 2

=> x =1

Answer 9

X=2

k cho mk nha

Hok tốt