log2(x^2-3)=2log4(6x-10)-1=》log2(x^2-3)=log4(6x-10)^2-1=>log2(x^2-3)=log2(6x-10)-1=》log2（x^2-3)=log2(6x-10)/2=>x^2-3=(6x-10)/2=>x^2-3x+2=0=>x1=1(因为x^2-3x=2