Răspuns :
[tex]144x^2=12x\\
144x^2-12x=0\\
x*(144x-12)=0\\
Avem~2~cazuri~:\\
x=0\\
sau\\144x-12=0=\ \textgreater \ 144x=12=\ \textgreater \ x= \frac{12}{144} =\ \textgreater \ x= \frac{1}{12} \\\\ x\in\{0; \frac{1}{12}\} [/tex]