8=-0.01x^2-0.1x+14

Solution for 8=-0.01x^2-0.1x+14 equation:

8=-0.01x^2-0.1x+14

We move all terms to the left:

8-(-0.01x^2-0.1x+14)=0

We get rid of parentheses

0.01x^2+0.1x-14+8=0

We add all the numbers together, and all the variables

0.01x^2+0.1x-6=0

a = 0.01; b = 0.1; c = -6;
Δ = b2-4ac
Δ = 0.12-4·0.01·(-6)
Δ = 0.25
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{-(0.1)-\sqrt{0.25}}{2*0.01}=\frac{-0.1-\sqrt{0.25}}{0.02}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0.1)+\sqrt{0.25}}{2*0.01}=\frac{-0.1+\sqrt{0.25}}{0.02}
$