(х-1)²-2(х-1)-3=0
x-1=t
t²-2t-3=0
D1=1+3=4
t1=1+2=3
t2=1-2=-1
x-1=3 x-1=-1
x=4 x=0
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(х-1)²-2(х-1)-3=0
x-1=t
t²-2t-3=0
D1=1+3=4
t1=1+2=3
t2=1-2=-1
x-1=3 x-1=-1
x=4 x=0