9u2+18u+9=0

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Solution for 9u2+18u+9=0 equation: 



9u^2+18u+9=0

a = 9; b = 18; c = +9;
Δ = b2-4ac
Δ = 182-4·9·9
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$u=\frac{-b}{2a}=\frac{-18}{18}=-1$

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