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X2-X+.25=0
We add all the numbers together, and all the variables
X^2-1X+0.25=0
a = 1; b = -1; c = +0.25;
Δ = b2-4ac
Δ = -12-4·1·0.25
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$X=\frac{-b}{2a}=\frac{1}{2}=1/2$
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