Odpowiedzi

2009-12-02T23:24:55+01:00
Log₃(2x²+1)/(x²+5)=log₃1
(2x²+1)/(x²+5)=1
(2x²+1)/(x²+5)-1=0
(2x²+1-x²-5)/(x²+5)=0
(x²-4)/(x²+5)=0
[(x-2)(x+2)]/(x²+5)=0