A=(-1)n2n

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Solution for A=(-1)n2n equation: 



=(-1)A2A

We move all terms to the left:

-((-1)A2A)=0



We calculate terms in parentheses: -((-1)A2A), so:

(-1)A2A

We multiply parentheses

-1A^2

Back to the equation:

-(-1A^2)



We get rid of parentheses

1A^2=0

We add all the numbers together, and all the variables

A^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:
$A=\frac{-b}{2a}=\frac{0}{2}=0$

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