Lg(x2 – 2х) – lg(2x + 12) = 0

Question

Lg(x2 – 2х) – lg(2x + 12) = 0

Answer 1

лг(х²-2х/2х+12)=0

х²-2х/2х+12==1

х²-2х=2х+12

х²-4х-12=0

по теореме Виета Х1=-2,Х2=6