m^2=-2m-1

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Solution for m^2=-2m-1 equation: 



m^2=-2m-1

We move all terms to the left:

m^2-(-2m-1)=0

We get rid of parentheses

m^2+2m+1=0

a = 1; b = 2; c = +1;
Δ = b2-4ac
Δ = 22-4·1·1
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$m=\frac{-b}{2a}=\frac{-2}{2}=-1$

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