(X^2)+6x+9=0

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Solution for (X^2)+6x+9=0 equation: 



(X^2)+6X+9=0

a = 1; b = 6; c = +9;
Δ = b2-4ac
Δ = 62-4·1·9
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$X=\frac{-b}{2a}=\frac{-6}{2}=-3$

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