195.83d+447.2d^2-82.58=0

Solution for 195.83d+447.2d^2-82.58=0 equation:

195.83d+447.2d^2-82.58=0

a = 447.2; b = 195.83; c = -82.58;
Δ = b2-4ac
Δ = 195.832-4·447.2·(-82.58)
Δ = 186068.4929
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$d_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$d_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$d_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(195.83)-\sqrt{186068.4929}}{2*447.2}=\frac{-195.83-\sqrt{186068.4929}}{894.4}
$
$d_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(195.83)+\sqrt{186068.4929}}{2*447.2}=\frac{-195.83+\sqrt{186068.4929}}{894.4}
$