=3.14*r2

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Solution for =3.14*r2 equation: 



=3.14*r2

We move all terms to the left:

-(3.14*r2)=0

We add all the numbers together, and all the variables

-(+3.14r^2)=0

We get rid of parentheses

-3.14r^2=0

a = -3.14; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·(-3.14)·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$r=\frac{-b}{2a}=\frac{0}{-6.28}=0$

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