0.18x^2-55x-30*60*55=0

Solution for 0.18x^2-55x-30*60*55=0 equation:

0.18x^2-55x-30*60*55=0

We add all the numbers together, and all the variables

0.18x^2-55x-99000=0

a = 0.18; b = -55; c = -99000;
Δ = b2-4ac
Δ = -552-4·0.18·(-99000)
Δ = 74305
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{-(-55)-\sqrt{74305}}{2*0.18}=\frac{55-\sqrt{74305}}{0.36}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-55)+\sqrt{74305}}{2*0.18}=\frac{55+\sqrt{74305}}{0.36}
$