80d^2=1.80

Solution for 80d^2=1.80 equation:

80d^2=1.80

We move all terms to the left:

80d^2-(1.80)=0

We add all the numbers together, and all the variables

80d^2-(1.8)=0

We add all the numbers together, and all the variables

80d^2-1.8=0

a = 80; b = 0; c = -1.8;
Δ = b2-4ac
Δ = 02-4·80·(-1.8)
Δ = 576
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$d_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$d_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{576}=24$
$d_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-24}{2*80}=\frac{-24}{160}
=-3/20
$
$d_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+24}{2*80}=\frac{24}{160}
=3/20
$