r2-(-7.5)-1.2=

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Solution for r2-(-7.5)-1.2= equation: 



r2-(-7.5)-1.2=

We move all terms to the left:

r2-(-7.5)-1.2-()=0

We add all the numbers together, and all the variables

r^2=0

a = 1; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·1·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

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

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