Log²(3)(x-1)-2log(-3)(9/(x-1)=7 ODЗ x-1>0 x>1log²(3)(x-1)+2(log(3)(9)-log(3)(x-1))=7log²(3)(x-1)+2(2-log(3)(x-1))=7log²(3)(x-1)+4-2log(3)(x-1)-7=0log²(3)(x-1)-2log(3)(x-1)-3=0log(3)(x-1)=tt²-2t-3=0 D=4+12=16t1=(2+4)/2=3 t2=(2-4)/2=-1 log(3)(x-1)=3 log(3)(x-1)=-1 x-1=3³ x-1=27 x=28 x-1=1/3 x=4/3