-18x^2+6400x+-430.200=0

Solution for -18x^2+6400x+-430.200=0 equation:

-18x^2+6400x+-430.200=0

We add all the numbers together, and all the variables

-18x^2+6400x=0

a = -18; b = 6400; c = 0;
Δ = b2-4ac
Δ = 64002-4·(-18)·0
Δ = 40960000
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{40960000}=6400$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(6400)-6400}{2*-18}=\frac{-12800}{-36}
=355+5/9
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6400)+6400}{2*-18}=\frac{0}{-36}
=0
$