10r2-20=0)

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Solution for 10r2-20=0) equation: 



10r^2-20=0)

We move all terms to the left:

10r^2-20-(0))=0

We add all the numbers together, and all the variables

10r^2=0

a = 10; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·10·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$r=\frac{-b}{2a}=\frac{0}{20}=0$

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