0.03x^2-30x+4800=0

Solution for 0.03x^2-30x+4800=0 equation:

0.03x^2-30x+4800=0

a = 0.03; b = -30; c = +4800;
Δ = b2-4ac
Δ = -302-4·0.03·4800
Δ = 324
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{324}=18$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-30)-18}{2*0.03}=\frac{12}{0.06}
=200
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-30)+18}{2*0.03}=\frac{48}{0.06}
=800
$