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logx2-log3^2=1
lokx2-log9=1
log(x2/9)=1
10^1=x2/9 /*9
x2=90
x=√90 lub x= -√90
x=3√10 lub x=-3√10
log x2 - 2log3 = 1
log x² -log 3² = log 10
(log (x²/9)=log 10
x²=90
x= √(90)