4r2+4r+1=0

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Solution for 4r2+4r+1=0 equation: 



4r^2+4r+1=0

a = 4; b = 4; c = +1;
Δ = b2-4ac
Δ = 42-4·4·1
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$r=\frac{-b}{2a}=\frac{-4}{8}=-1/2$

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