U=-0.5x2

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Solution for U=-0.5x2 equation: 



=-0.5U^2

We move all terms to the left:

-(-0.5U^2)=0

We get rid of parentheses

0.5U^2=0

a = 0.5; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·0.5·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$U=\frac{-b}{2a}=\frac{0}{1}=0$

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