9х²-6х+1=0
(3x-1)²=0
6х²+х-1=0
D=1+24=25=5²
x1=-1-5/12=-1/2
x2=-1+5/12=1/3
6х²+х-1=6*(x+1/2)(x-1/3)=(2x+1)(3x-1)
(9х²-6х+1)/(6х²+х-1)=(3x-1)²/((2x+1)(3x-1))=(3x-1)/(2x+1)
найдем значение при х=-1 1/6=-7/6
(-3*7/6-1)/(-2*7/6+1)=(-7/2-1)/(-7/3+1)=-9/2 : (-4/3)=9/2*3/4=27/8=3 3/8