lg la2 x-3lgx+2=0 rezolvati in r

Răspuns :

[tex] lg^{2}x-3lgx+2=0 ;x\ \textgreater \ 0 \\ lgx=t \\ t^{2}-3t+2=0 \\ t=1;t=2 \\ lgx=1;x=10 \\ lgx=2;x=100 [/tex]