r^2-38r+361=0

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Solution for r^2-38r+361=0 equation: 



r^2-38r+361=0

a = 1; b = -38; c = +361;
Δ = b2-4ac
Δ = -382-4·1·361
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$r=\frac{-b}{2a}=\frac{38}{2}=19$

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