3х²-6/2*(х+1)=х-1
3х²-3(х+1)=х-1
3х²-3х-3=х-1
3х²-3х-3-х+1=0
3х²-4х-2=0
х= -(-4)±√(-4)²-4*3*(-2)/2*3
х=4±√16+24/6
х=4±√40/6
х=4±2√10/6
х1=2+√10/3
х2=2-√10/3
3х²-6/2*(х+1)=х-1
3х²-3(х+1)=х-1
3х²-3х-3=х-1
3х²-3х-3-х+1=0
3х²-4х-2=0
х= -(-4)±√(-4)²-4*3*(-2)/2*3
х=4±√16+24/6
х=4±√40/6
х=4±2√10/6
х1=2+√10/3
х2=2-√10/3