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x^2+3x+2.25=0
a = 1; b = 3; c = +2.25;
Δ = b2-4ac
Δ = 32-4·1·2.25
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$x=\frac{-b}{2a}=\frac{-3}{2}=-1+1/2$
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