k^2+18k+33=0

Solution for k^2+18k+33=0 equation:

k^2+18k+33=0

a = 1; b = 18; c = +33;
Δ = b2-4ac
Δ = 182-4·1·33
Δ = 192
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$k_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$k_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{192}=\sqrt{64*3}=\sqrt{64}*\sqrt{3}=8\sqrt{3}$
$k_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(18)-8\sqrt{3}}{2*1}=\frac{-18-8\sqrt{3}}{2}
$
$k_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(18)+8\sqrt{3}}{2*1}=\frac{-18+8\sqrt{3}}{2}
$