I*z^2-2z+1=0

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Solution for I*z^2-2z+1=0 equation: 



*I^2-2I+1=0

We add all the numbers together, and all the variables

I^2-2I+1=0

a = 1; b = -2; c = +1;
Δ = b2-4ac
Δ = -22-4·1·1
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$I=\frac{-b}{2a}=\frac{2}{2}=1$

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