2x2+6x-8=-12.5

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Solution for 2x2+6x-8=-12.5 equation: 



2x^2+6x-8=-12.5

We move all terms to the left:

2x^2+6x-8-(-12.5)=0

We add all the numbers together, and all the variables

2x^2+6x+4.5=0

a = 2; b = 6; c = +4.5;
Δ = b2-4ac
Δ = 62-4·2·4.5
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-6}{4}=-1+1/2$

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