Question

решите уравнение
_______________

Answer 1

$ODZ:x\ \textgreater \ 0\\ \\ log_{2} ^{2} x+ log_{2} 2-log_{2} x-3=0 \\ \\ log_{2} ^{2} x-log_{2} x-2=0 \\ \\ D=9 \\ \\ log_{2} x=2 \\ \\ x=4 \\ \\ log_{2} x=-1 \\ \\x= \frac{1}{2}$

ответ {1/2;4}