log(2x)=t
log^2(2x)=t^2
t^2+t-30=0
D=1-4*(-30)=121=11^2
t1=-1+11/2=5
t2=-1-11/2=-6
log(2x)=5
2x=10^5
x=50000
log(2x)=-6
2x=10^-6
x=1/2*10^6
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log(2x)=t
log^2(2x)=t^2
t^2+t-30=0
D=1-4*(-30)=121=11^2
t1=-1+11/2=5
t2=-1-11/2=-6
log(2x)=5
2x=10^5
x=50000
log(2x)=-6
2x=10^-6
x=1/2*10^6