log₃ ( x² - x - 2 ) ≤ 1 + log₃
x² - x - 2=(x-2)(x+1)
log₃ ( x² - x - 2 )=log₃(x+1)+log₃(x-2)
log₃ =log₃(x+1)-log₃(x+2)
log₃(x+1)+log₃(x-2)<=log₃(x+1)-log₃(x+2)+1</p>
log₃(x-2)+log₃(x+2)<= log₃3</p>
x^2-4<=3</p>
x^2<=7 -sqrt(7)<=x<=sqrt(7)</p>
x² - x - 2>0 x<-1 U x>2
-sqrt(7)<=x<-1 U (2;sqrt7]</p>
(x+1)/(x+2)>0 x<-2 U x>-1
[-sqrt(7);-2) U (2;sqrt(7)]