Question

(6x-3)\(^2\)=\(\dfrac{4}{9}\)   ?

Answer 1

`(6x-3)^2=4/9`

`<=>|6x-3|=2/3`

`<=>` $\left[\begin{matrix} 6x-3=\dfrac{2}{3}\\ 6x-3=\dfrac{-2}{3}\end{matrix}\right.$

`<=>` $\left[\begin{matrix} x=\dfrac{11}{18}\\ x=\dfrac{7}{18}\end{matrix}\right.$

Vậy `S={11/18;7/18}`

Answer 2

`(6x-3)^2 =4/9`

`=>(6x-3)^2 =2/3 ^2`

`=>6x-3=2/3`

`=>6x=2/3+3`

`=>6x=11/3`

`=>x=11/3:6`

`=>x=11/18`

Vậy `x=11/18`

Answer 3

`(6x-3)^2=4/9`

`=>(6x-3)^2=(2/3)^2`

\(\Rightarrow\left[{}\begin{matrix}6x-3=\dfrac{2}{3}\\6x-3=-\dfrac{2}{3}\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}6x=\dfrac{11}{3}\\6x=\dfrac{7}{3}\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=\dfrac{11}{18}\\x=\dfrac{7}{18}\end{matrix}\right.\)