x^2-0.16x-0.16=0

Solution for x^2-0.16x-0.16=0 equation:

x^2-0.16x-0.16=0

a = 1; b = -0.16; c = -0.16;
Δ = b2-4ac
Δ = -0.162-4·1·(-0.16)
Δ = 0.6656
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{-(-0.16)-\sqrt{0.6656}}{2*1}=\frac{0.16-\sqrt{0.6656}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-0.16)+\sqrt{0.6656}}{2*1}=\frac{0.16+\sqrt{0.6656}}{2}
$