X^2-10.8x+10.8=0

Solution for X^2-10.8x+10.8=0 equation:

X^2-10.8X+10.8=0

a = 1; b = -10.8; c = +10.8;
Δ = b2-4ac
Δ = -10.82-4·1·10.8
Δ = 73.44
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{-(-10.8)-\sqrt{73.44}}{2*1}=\frac{10.8-\sqrt{73.44}}{2}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-10.8)+\sqrt{73.44}}{2*1}=\frac{10.8+\sqrt{73.44}}{2}
$