a^2=-1-2a

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



a^2=-1-2a

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

a^2+2a+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:
$a=\frac{-b}{2a}=\frac{-2}{2}=-1$

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