Question

1) log(2)x=4
2) log(7) log(3) log(2)x=0
3) log(8) x^2-7x+4= log (8) x-3
4) log (3) (x+1) + log(3) (x+3)=1
5) log ^2 (3) x - 4 log (3) x +3 =0
6) lg^2 x - lg x^2 -3 =0

Answer 1

Решение ниже в приложении ===========

6) $lg^2 x - lg x^2 -3 =0 \ lg^2 x - 2lg x -3 =0 \ t^2 x - 2t -3 =0$
t1 = 3 ;  t2 = -1
$lg x=3 \ x_1=1000$

$lg x=-1 \ x_2= frac{1}{10}$