9f2+12f+4=0

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Solution for 9f2+12f+4=0 equation: 



9f^2+12f+4=0

a = 9; b = 12; c = +4;
Δ = b2-4ac
Δ = 122-4·9·4
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$f=\frac{-b}{2a}=\frac{-12}{18}=-2/3$

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