2 câu trả lời
`\sqrt{9(x-2)^2}=6` `(x∈R)`
⇔`|3(x-2)|=6`
⇔`|3x-6|=6`
⇔\(\left[ \begin{array}{l}3x-6=6\\3x-6=-6\end{array} \right.\)
⇔\(\left[ \begin{array}{l}x=4(tm)\\x=0(tm)\end{array} \right.\)
Vậy `S={4,0}`
|3(x-2)|=6
3(x-2)=6 hoặc 3(x-2)=-6
x-2. =2. x-2. =-2
x. =4. x. =0
Vậy s={4,0}