(x-1)2 = x2 -2x +1
√(x-102 = i x- 1 I
I I x - 1 I -1 I= 1
Ix - 1 I - 1= - 1 lub I x - 1 I - 1 = 1
I x - 1 I = 0 lub I x - 1 I = 2
x = 1 lub x - 1 = -2 lub x - 1 = 2
x = - 1 lub x = 3
dp; x= 0 x = - 1 x = 3