X^2+1.80x-0.3384=0

Solution for X^2+1.80x-0.3384=0 equation:

X^2+1.80X-0.3384=0

a = 1; b = 1.80; c = -0.3384;
Δ = b2-4ac
Δ = 1.802-4·1·(-0.3384)
Δ = 4.5936
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{-(1.80)-\sqrt{4.5936}}{2*1}=\frac{-1.8-\sqrt{4.5936}}{2}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1.80)+\sqrt{4.5936}}{2*1}=\frac{-1.8+\sqrt{4.5936}}{2}
$