R=8.4r^2

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Solution for R=8.4r^2 equation: 



=8.4R^2

We move all terms to the left:

-(8.4R^2)=0

We get rid of parentheses

-8.4R^2=0

a = -8.4; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·(-8.4)·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$R=\frac{-b}{2a}=\frac{0}{-16.8}=0$

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