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338.7x^2+1x-1.6=0
We add all the numbers together, and all the variables
338.7x^2+x-1.6=0
a = 338.7; b = 1; c = -1.6;
Δ = b2-4ac
Δ = 12-4·338.7·(-1.6)
Δ = 2168.68
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-\sqrt{2168.68}}{2*338.7}=\frac{-1-\sqrt{2168.68}}{677.4} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{2168.68}}{2*338.7}=\frac{-1+\sqrt{2168.68}}{677.4} $
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