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k2+4k+4=0
We add all the numbers together, and all the variables
k^2+4k+4=0
a = 1; b = 4; c = +4;
Δ = b2-4ac
Δ = 42-4·1·4
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$k=\frac{-b}{2a}=\frac{-4}{2}=-2$
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