Question

Ofer coroana +puncte
5^2x-13•5^x+12=0

Answer 1

$5^{2x} -13*5^x+12=0 \\ fie 5^x=t;t\ \textgreater \ 0 \\ t^{2}-13t+12=0 \\ t=1;y=12 \\ 5^x=1;x=0 \\ 5^x=12;x= log_{5} 12$