S=4r2

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Solution for S=4r2 equation: 



=4S^2

We move all terms to the left:

-(4S^2)=0

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

                              Stosujemy wzór:
$S=\frac{-b}{2a}=\frac{0}{-8}=0$

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