7n^2-1.6n+0.08=0

Solution for 7n^2-1.6n+0.08=0 equation:

7n^2-1.6n+0.08=0

a = 7; b = -1.6; c = +0.08;
Δ = b2-4ac
Δ = -1.62-4·7·0.08
Δ = 0.32
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-1.6)-\sqrt{0.32}}{2*7}=\frac{1.6-\sqrt{0.32}}{14}
$
$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1.6)+\sqrt{0.32}}{2*7}=\frac{1.6+\sqrt{0.32}}{14}
$