(0)x=15000-300x^2

Solution for (0)x=15000-300x^2 equation:

(0)x=15000-300x^2

We move all terms to the left:

(0)x-(15000-300x^2)=0

We add all the numbers together, and all the variables

-(15000-300x^2)+x=0

We get rid of parentheses

300x^2+x-15000=0

a = 300; b = 1; c = -15000;
Δ = b2-4ac
Δ = 12-4·300·(-15000)
Δ = 18000001
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{-(1)-\sqrt{18000001}}{2*300}=\frac{-1-\sqrt{18000001}}{600}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{18000001}}{2*300}=\frac{-1+\sqrt{18000001}}{600}
$