8k^2+80k=-200

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Solution for 8k^2+80k=-200 equation: 



8k^2+80k=-200

We move all terms to the left:

8k^2+80k-(-200)=0

We add all the numbers together, and all the variables

8k^2+80k+200=0

a = 8; b = 80; c = +200;
Δ = b2-4ac
Δ = 802-4·8·200
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$k=\frac{-b}{2a}=\frac{-80}{16}=-5$

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