1/(x-1)^2+4/(x-1)-12=0
1/(x-1)=z x≠1 z²+4z-12=0 z1=-6 z2=2 по теореме Виета 1/(x-1)=-6 x-1=-1/6 x1=5/6 1/(x-1)=2 x-1=1/2 x2=3/2