0=-0.1x^2+143x-2850

Solution for 0=-0.1x^2+143x-2850 equation:

0=-0.1x^2+143x-2850

We move all terms to the left:

0-(-0.1x^2+143x-2850)=0

We add all the numbers together, and all the variables

-(-0.1x^2+143x-2850)=0

We get rid of parentheses

0.1x^2-143x+2850=0

a = 0.1; b = -143; c = +2850;
Δ = b2-4ac
Δ = -1432-4·0.1·2850
Δ = 19309
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{-(-143)-\sqrt{19309}}{2*0.1}=\frac{143-\sqrt{19309}}{0.2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-143)+\sqrt{19309}}{2*0.1}=\frac{143+\sqrt{19309}}{0.2}
$