Question

 9 ( 3x –2 ) = x ( 2 –3x )

Tìm x

Answer 1

\(9\left(3x-2\right)=x\left(2-3x\right)\)

\(\Rightarrow9\left(3x-2\right)-x\left(2-3x\right)=0\)

\(\Rightarrow\left(3x-2\right)\left(9+x\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x=\dfrac{2}{3}\\x=-9\end{matrix}\right.\)

Answer 2

9(3x-2)=x(2-3x)

9(3x-2)-x(2-3x)=0

9(3x-2)+x(3x-2)=0

(3x-2)(9+x)=0

=>TH1:3x-2=0;x=3/2

=>TH2:9+x=0;x=-9