Лог_4 (9х^2+1/4)=-1/2
㏒₄(9x²+1/4)=- 1/2 9x²+1/4= 4⁻¹⁾₂ 9x²+1/4=1/2 9x²+1/4-1/2=0 9x²-1/4=0 (3x-1/2)(3x+1/2)=0 3x-1/2=0 3x+1/2=0 3х=1/2 3х=-1/2 х=1/6 х= -1/6