6a^2-5a+1=0,
D=1,
a1=1/3, a2=1/2,
6a^2-5a+1=6(a-1/3)(a-1/2)=(3a-1)(2a-1),
(6a^2-5a+1)/(1-4a^2)=(3a-1)(2a-1)/(-(2a-1)(2a+1))=-(3a-1)/(2a+1)=(1-3a)/(2a+1)
6a^2-5a+1=0,
D=1,
a1=1/3, a2=1/2,
6a^2-5a+1=6(a-1/3)(a-1/2)=(3a-1)(2a-1),
(6a^2-5a+1)/(1-4a^2)=(3a-1)(2a-1)/(-(2a-1)(2a+1))=-(3a-1)/(2a+1)=(1-3a)/(2a+1)