-0.000012x^2-0.1x+168=0

Solution for -0.000012x^2-0.1x+168=0 equation:

-0.000012x^2-0.1x+168=0

We add all the numbers together, and all the variables

-5x^2-0.1x+168-1.2E=0

We add all the numbers together, and all the variables

-5x^2-0.1x+164.73806180585=0

a = -5; b = -0.1; c = +164.73806180585;
Δ = b2-4ac
Δ = -0.12-4·(-5)·164.73806180585
Δ = 3294.771236117
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{3294.771236117}}{2*-5}=\frac{0.1-\sqrt{3294.771236117}}{-10}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-0.1)+\sqrt{3294.771236117}}{2*-5}=\frac{0.1+\sqrt{3294.771236117}}{-10}
$