Question

12/x-3=x-3/3

Answer 1

srr mk làm nhầm

\(\dfrac{12}{x-3}=\dfrac{x-3}{3}\)

=> \(\left(x-3\right)^2=12.3\)

=> x-3=6 => x=9

hoặc x-3=-6 => x=-3

 

Answer 2

\(\dfrac{12}{x-3}=\dfrac{x-3}{3}\)

<=> \(12.3=\left(x-3\right)^2\)

=> \(\left(x-2\right)^3=36\)

=> \(\left(x-2\right)=6\)=> x=8

hoặc \(x-2=-6\) => x= -4

Answer 3

Giải:

\(\dfrac{12}{x-3}=\dfrac{x-3}{3}\) 

\(\Rightarrow\left(x-3\right).\left(x-3\right)=12.3\) 

\(\Rightarrow\left(x-3\right)^2=36\) 

\(\Rightarrow\left(x-3\right)^2=6^2\) hoặc \(\left(x-3\right)^2=\left(-6\right)^2\) 

      \(x-3=6\) hoặc \(x-3=-6\) 

             \(x=9\) hoặc \(x=-3\) 

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